Developer Tools
98 toolsFree browser-based developer tools. JSON formatter, Base64 encoder, regex tester, cron generator, and more. 100% private — no data sent to any server.
.htaccess Generator — Apache Config Builder & Rewrite Rule Maker
Generate production-ready Apache .htaccess configuration files with visual controls. Configure 301 redirects, SSL HTTPS enforcement, Gzip compression, browser caching, security headers, hotlink protection, and clean URLs — 100% in-browser.
API Key Generator — Cryptographically Secure Secret Key & Token Creator
Free, private client-side API key generator. Generate cryptographically secure tokens, secrets, and API credentials across Hex, Base64, Alphanumeric, and UUID v4 formats using Web Crypto API.
API Response Mocker — Free Online Mock API Endpoint Creator
Define, simulate, and test fake REST API endpoints in your browser. Configure HTTP methods, custom status codes, JSON response bodies, artificial latency delays, and export collections — 100% client-side.
Air-Gapped 2FA/TOTP Key & QR Studio — RFC 6238 Generator
Free, private, serverless in-browser 2FA/TOTP key generator and QR code studio. Create Base32 secret keys, audit RFC 6238 tokens, and print emergency backup kits.
Air-Gapped WireGuard Keypair & Config Studio — Zero-Knowledge VPN Generator
Free, private, air-gapped WireGuard keypair and configuration generator. Generate Curve25519 (X25519) keys, wg0.conf server configs, client profiles, and mobile QR codes 100% in your browser.
Background Pattern Generator — Free Online Seamless CSS & SVG Pattern Maker
Create beautiful seamless SVG and CSS background patterns online. Free, private, client-side pattern generator with 16 geometric styles, custom colors, live preview, and instant CSS data URI export.
Base64 Encoder & Decoder — Free Online Text & Data Converter
Encode and decode Base64 strings instantly in your browser. Full UTF-8 Unicode support for Arabic and special symbols, real-time byte metrics, and zero server uploads — 100% client-side.
Bcrypt Generator — Hash & Verify Passwords with Salt Rounds
Free, private client-side bcrypt generator. Hash and verify passwords with configurable cost factors (rounds 4-16), automatic cryptographic salts, and zero server transmission.
Binary to Text Converter — Free Instant Binary, Hex, Octal & Decimal Tool
Free, private, serverless binary to text converter. Convert instantly between text and binary, hexadecimal, octal, and decimal — 100% client-side with zero data tracking.
Border Radius Generator — Visual CSS Corner Rounding & Shape Styler
Free visual CSS border-radius generator. Design smooth rounded corners, pill badges, and organic asymmetric shapes with live reactive preview. 100% client-side.
Box Shadow Generator — Visual CSS Elevation & Shadow Styler
Free visual CSS box-shadow generator with live preview. Adjust horizontal/vertical offsets, blur, spread, color opacity, inset, and border radius. Copy clean CSS instantly. 100% client-side.
CSS Animation Generator — Keyframe Animation & Motion Styler
Free visual CSS animation generator with live preview. Create custom @keyframes animations with adjustable duration, timing functions, delay, iterations, and direction. Copy clean CSS instantly. 100% client-side.
CSS Flexbox & Grid Playground — Visual Layout Builder & Styler
Free visual CSS Flexbox and Grid playground with live preview. Build, test, and extract production-ready responsive layout code with container and per-item controls. 100% client-side.
CSS Gradient Generator — Free Online Visual Gradient Maker & CSS Code Builder
Create beautiful linear, radial, and conic CSS gradients online. Free, private, client-side visual gradient builder with 8 curated presets, multi-stop color editor, and instant CSS code copy.
CSS Gradient Generator — Linear, Radial & Conic Color Styler
Free visual CSS gradient generator with live preview. Create linear, radial, and conic color gradients with unlimited stops, angle controls, and presets. Copy clean CSS instantly. 100% client-side.
CSS Minifier & Beautifier — Free Online Stylesheet Optimizer
Minify and beautify CSS code instantly in your browser. Remove whitespace, comments, and redundant characters to accelerate page load speeds and Core Web Vitals.
CSS Text Shadow Generator & Visual Typography Studio — 3D, Glow & Layered Effects
Free, private, serverless CSS text-shadow generator. Create layered typography shadows, neon glow, retro 3D extrusions, and letterpress effects with live preview and cross-browser CSS code generation.
CSV Data Analyzer — Batch Insights & In-Browser Visual Analytics
Analyze CSV files instantly with high-speed in-browser batch processing, automated statistical breakdowns, multi-type interactive charts, data filtering, and column validation — 100% client-side with zero cloud uploads.
CSV Delimiter, Encoding & Dialect Normalizer — Fix Mojibake & Excel BOM
Free, private, serverless in-browser CSV dialect normalizer and delimiter converter. Fix Arabic Mojibake with UTF-8 BOM, convert semicolons and tabs, and pad ragged rows.
CSV to JSON Converter — Free Instant Tabular to JSON Parser
Free, private, serverless CSV to JSON converter. Parse CSV files with configurable delimiters, RFC 4180 quotes, and header rows — 100% client-side with zero data tracking.
CSV to XML Converter — Free Instant Tabular to XML Generator
Free, private, serverless CSV to XML converter with bulk file support. Convert CSV data to well-formed XML with custom root/row tags and auto-delimiter detection — 100% client-side with zero data tracking.
Caddyfile Studio & Nginx-to-Caddy Converter
Free, private, in-browser Caddyfile Studio and Nginx-to-Caddy Converter. Build production-ready Caddy v2 web server configurations and transpile Nginx server blocks into clean Caddyfiles with automatic HTTPS, reverse proxy, PHP-FPM, and security headers. Zero server uploads.
Changelog Generator — Keep a Changelog & SemVer Markdown Creator
Create professional, standards-compliant CHANGELOG.md files instantly in your browser. Organize software releases with Semantic Versioning and 6 structured change categories.
Color Blindness Simulator — Free Online Color Vision Deficiency Test & WCAG Accessibility Tool
Test images and designs for color blindness online free. Scientifically accurate Brettel-Viénot simulation of 8 vision deficiency types with side-by-side comparison, grid view, severity controls, and batch export. 100% client-side.
Color Contrast Checker — WCAG 2.1 & APCA Accessibility Tester
Free, private, client-side WCAG 2.1 color contrast checker. Test foreground and background color combinations for AA and AAA accessibility compliance with real-time text previews.
Color Format Converter — Free Instant HEX, RGB, HSL & CMYK Tool
Free, private, serverless color format converter with batch support. Convert colors instantly between HEX, RGB, HSL, and CMYK formats with visual color picker and live swatch — 100% client-side with zero data tracking.
Color Name Finder — Identify CSS Named Colors, HEX & RGB Codes Online Free
Identify CSS named colors from any HEX, RGB, or visual picker input online free. Indexes all 148 W3C CSS Level 4 colors with Euclidean distance scoring, similar colors grid, and instant HSL/HEX copy. 100% client-side.
Color Palette Generator — Harmonious Color Schemes & CSS Export
Generate balanced, harmonious color palettes instantly in your browser. Choose from 6 mathematical harmony models: Analogous, Complementary, Triadic, Split-Complementary, Monochromatic, or Random, and export production-ready CSS variables.
Color Picker & Converter — Instant HEX, RGB & HSL Codes
Pick and convert colors between HEX, RGB, and HSL formats instantly in your browser. Features live visual preview, bidirectional text editing, 1-click clipboard copying, and a 12-color recent history buffer.
Color Scheme Generator — Harmonious Palette Creator & CSS Tokens Builder
Create harmonious color palettes online free based on color theory. Generate complementary, analogous, triadic, split-complementary, tetradic, and monochromatic schemes. Export to CSS, SCSS, JSON, PNG — 100% client-side.
Cron Expression Generator — Interactive Schedule Builder
Professional, private, serverless cron expression generator and visual crontab builder. Generate standard 5-field cron schedules with instant presets, human-readable descriptions, and next 5 run times simulation. 100% in-browser calculation with zero server transmission.
Data Size Converter — Free Bytes, KB, MB, GB, TB & PB Calculator
Free, private in-browser digital storage and data size converter. Convert between bits, bytes, KB, KiB, MB, MiB, GB, GiB, TB, TiB, PB, and PiB with dual SI and IEC standards.
Data Transfer Rate Converter — Free Mbps, MB/s, Gbps & Speed Calculator
Free, private in-browser data transfer rate converter. Convert between Mbps, MB/s, Gbps, KB/s, MiB/s, and Tbps with real-time transfer time estimates for 1GB, 10GB, and 1TB.
Diff Checker — Side-by-Side Text & Code Comparison
Free, private, serverless diff checker and code comparison studio. Compare two text buffers side-by-side with line-by-line diff highlighting, additions/deletions counts, ignore whitespace/case filters, and zero server transmission.
Docker Compose Generator — Visual YAML Builder
Professional, private, serverless Docker Compose generator and visual YAML builder. Configure multi-container application stacks with ready-to-use templates (WordPress, Node, Django), service management, and persistent volumes — 100% in-browser calculation.
Docker Compose to Kubernetes (K8s) Studio — In-Browser YAML Transpiler
Free, private in-browser Docker Compose to Kubernetes manifests transpiler. Convert docker-compose.yml into production Deployments, Services, PVCs, ConfigMaps, and Ingress.
Dockerfile Security Linter & Production Best-Practices Studio
Free, private, serverless in-browser Dockerfile security linter and best-practices auditor. Audit containers against 25+ CIS security rules, fix root execution, and optimize build caching.
Encryption & Decryption Tool — Multi-Algorithm AES-GCM, Base64, ROT13 & XOR
Free, private client-side encryption and decryption tool. Secure text with military-grade AES-GCM 256-bit, PBKDF2 key derivation (100,000 iterations), Base64, ROT13, and XOR ciphers.
Environment Variable Editor — Free Online .env File Editor
Professional, private, serverless .env file editor and environment variable manager. Parse, edit, validate, mask secrets, and export .env files or JSON objects — 100% in-browser calculation with zero server transmission.
Epoch & Unix Timestamp Converter — Bulk Timestamp Studio
Professional, high-precision Unix epoch timestamp converter with bulk conversion support. Convert Unix timestamps in seconds and milliseconds to human-readable dates, UTC, local time, ISO 8601, and relative time. Calculate epoch timestamps from any date. Features a live Unix clock, automatic timezone detection, and zero server uploads for 100% private client-side processing.
Fake Data Generator — Bulk Test Data
Free, private, serverless fake data generator with bulk support. Generate realistic names, emails, phones, addresses, UUIDs & 30+ data types. Export to CSV, JSON, or SQL — 100% in your browser, no upload. 100% serverless.
Favicon Generator — Free In-Browser App Icon & Meta Tag Creator
Free, private, serverless favicon generator. Create multi-resolution PNG icons and PWA web app assets from images or text/emoji. Complete with HTML link tags.
Find & Replace — Bulk Text Search & Regex Substitution
Free, private, serverless Find & Replace tool with bulk support. Search and replace text using plain text or regular expressions with case-matching and whole-word toggles — 100% client-side.
Font Pairing Generator — Free Online Typography Tool & CSS Font Matcher
Discover perfect font pairings online free. Preview 40+ Google Fonts and 32 curated typography combinations with custom text, light/dark modes, font size sliders, and instant CSS code export. 100% client-side.
Git Commit Message Generator — Conventional Commits Studio
Free, private, serverless Git commit message generator. Automatically generate conventional commit messages from natural descriptions or git diff patches. Supports 11 standard types, auto-detected scopes, breaking change formatting, gitmoji, and 4 output styles — 100% client-side in your browser.
GraphQL Query Builder — Visual Query Constructor Studio
Free, private, serverless GraphQL query builder studio. Construct complex GraphQL queries, mutations, and subscriptions visually with a nested tree editor, typed arguments, aliases, and real-time syntax generation — 100% client-side in your browser.
HAR to Postman & OpenAPI Converter
Free, private, in-browser HAR to Postman and OpenAPI Converter. Convert HTTP Archive (.har) files to clean Postman Collection v2.1, OpenAPI 3.0 (YAML/JSON), and cURL scripts with automatic token redaction and static asset filtering. Zero server uploads.
HTML Formatter & Minifier — Bulk Markup Studio
Free, private, serverless HTML formatter and minifier with bulk processing support. Beautify messy markup with custom 2-space, 4-space, or tab indentation, or minify HTML for production. Features real-time tag counts, byte size comparisons, line analytics, and 100% client-side execution.
HTML to Markdown Converter — Smart Client-Side Parser
Free, private, serverless HTML to Markdown converter. Convert HTML code to clean CommonMark and GFM Markdown syntax. Supports headers, tables, code blocks, lists, links, and images. 100% client-side with zero data tracking.
ICO Converter — Free Multi-Size Favicon Generator Tool
Free, private, serverless ICO converter. Generate multi-resolution .ico favicon files (16x16 to 256x256) from PNG, JPG, or WebP with 32-bit alpha transparency. 100% in-browser generation with zero server uploads.
Image EXIF Viewer — Free In-Browser Photo Metadata & GPS Inspector
Free, private, serverless image EXIF viewer. Read camera model, shutter speed, aperture, ISO, timestamps, and GPS coordinates from photos locally. 100% client-side.
Image to Base64 Converter — Convert Images to Base64 & Data URI Online
Free, private, client-side Image to Base64 converter. Convert PNG, JPG, WebP, and SVG images to Base64 strings and RFC 2397 Data URIs instantly without uploading files.
JSON Formatter & Validator — In-Place Data Studio
Free, private, serverless JSON formatter, beautifier, and validator studio. Prettify messy JSON with 2-space indentation, minify payloads for production, and validate RFC 8259 syntax with real-time error diagnostics, depth calculation, and byte analytics — 100% client-side in your browser.
JSON Schema Validator — Draft-07 Data Contract & Syntax Testing Studio
Validate JSON data against JSON Schema Draft-07 in real time. Free, private, client-side data contract studio with type assertions, constraints, pattern matching, and exact error paths.
JSON Viewer — Interactive Tree Explorer & Formatter
Free, private, serverless JSON viewer. Parse and explore nested JSON data with an interactive tree explorer, search, collapse/expand, format/minify, and copy path — 100% client-side, zero data sent.
JSON to CSV Converter — Bulk NDJSON & Nested Flattening Tool
Free, private, serverless JSON to CSV converter with bulk NDJSON support and nested object flattening. Convert JSON arrays and objects to RFC 4180 CSV locally in your browser.
JSON to XML Converter — Free Bulk JSON to XML Tool
Free, private, serverless JSON to XML converter with bulk support. Convert JSON data to well-formed XML with custom tags, indentation, CDATA, and ZIP export — 100% client-side.
JSON to YAML Converter — Free Bulk JSON to YAML Tool
Free, private, serverless JSON to YAML converter with bulk support. Convert JSON files to YAML format with smart quoting, key sorting, custom indentation, and ZIP export — 100% client-side.
JWT Decoder & Inspector — In-Browser Token Debugger & Claims Studio
Free, private, client-side JWT decoder and inspector studio. Decode JSON Web Tokens instantly to view the header, payload claims, and signature. Real-time expiration status, RFC 7519 claim descriptions, and Unix epoch translation — 100% in your browser.
JavaScript Minifier & Beautifier — In-Browser Code Compression Studio
Free, private, serverless JavaScript minifier and code beautifier studio. Minify JS code by stripping comments, whitespace, and console.log statements, or beautify minified scripts for debugging. Real-time bytes saved telemetry — 100% in your browser.
Linux Systemd Service & Timer Generator
Free, private, serverless Linux Systemd Service & Timer Generator. Visually architect production-ready systemd .service and .timer units. Configure security sandboxing, cgroups resource limits, auto-restart policies, and export one-click bash deployment scripts. No data leaves your browser — 100% client-side.
Lorem Ipsum Generator — Professional Dummy Text & Placeholder Synthesis
Free, private, serverless Lorem Ipsum Generator. Synthesize naturalistic placeholder paragraphs, sentences, and words with instant HTML export — 100% client-side.
Markdown Preview — Real-Time GFM Editor & Typographic Studio
Free, private, serverless Markdown Preview studio with GitHub Flavored Markdown (GFM) support. Live split-screen preview with instant HTML export — 100% client-side.
Markdown Table Generator & Visual Spreadsheet Editor Studio
Free, private, serverless online Markdown table generator with visual spreadsheet editor. Create, align, transpose, and copy GitHub Flavored Markdown tables — import CSV, TSV, or paste Excel data. 100% client-side in your browser.
Markdown to HTML Converter — Real-Time Client-Side Parsing
Convert Markdown text into clean, semantic HTML markup directly inside your browser. Fast, private, client-side rendering with live preview, GitHub Flavored Markdown support, and zero server uploads.
Named Entity Recognition (NER) Extractor — Client-Side AI Entity Tagger
Extract and classify persons, organizations, geopolitical locations, and products from unstructured text using in-browser neural token classification with granular confidence scores — 100% client-side with zero cloud uploads.
Nginx Config Generator & Reverse Proxy Builder — Production nginx.conf Studio
Free, private, serverless Nginx config generator. Visually construct production-ready nginx.conf files with SSL/TLS 1.3, reverse proxy, gzip compression, microcaching, security headers, rate limiting, and SPA routing.
Number Base Converter — Radix Calculator (2 to 36)
Convert numbers between binary, octal, decimal, hexadecimal, and custom bases (2-36) instantly. Features arbitrary-precision math, bit/byte analysis, and bulk conversion.
Ohm's Law Calculator — Voltage, Current, Resistance & Power Solver
Free Ohm's Law calculator to compute voltage, current, resistance, and electrical power with interactive circuit formulas, unit scaling, and instant results.
PNG to WebP Converter — Bulk Image Compression & Optimization
Convert PNG, JPG, and BMP images to modern WebP format online with bulk processing. Reduce image file sizes by up to 80% while preserving alpha transparency and visual fidelity. 100% in-browser execution.
Parquet & DuckDB In-Browser SQL Studio — Client-Side Columnar Explorer
Free, private, in-browser Apache Parquet file viewer and SQL query studio. Inspect columnar schemas, execute SQL queries locally, and export to CSV, JSON, and SQL.
Prime Number Checker — Primality Test, Sieve & Factorization Tool
Free prime number checker to test integer primality, generate primes across custom ranges via the Sieve of Eratosthenes, and compute prime factorizations.
Regex Generator & Visual Pattern Builder Studio — Build, Test & Debug Regular Expressions
Free, private, serverless regex generator and visual pattern builder. Construct, test, and debug regular expressions with live syntax highlighting, capture groups, presets, and ECMAScript flags.
Regex Tester & Debugger — Interactive Regular Expression Sandbox
Free, private, serverless regex tester and debugger. Test regular expressions in real time with syntax highlighting, capture group extraction, match statistics, ReDoS safeguards, and multi-line flag support.
Remove Duplicate Lines — Enterprise Text & List Deduplicator
Free, private, serverless Remove Duplicate Lines tool. Deduplicate text with case sensitivity, whitespace trimming, empty line filtering, and sorting — 100% client-side.
SMD Resistor EIA-96 & Chip Code Decoder
Free, private, serverless in-browser SMD resistor chip code decoder. Decode EIA-96 1%, 3-digit E24 5%, 4-digit precision, and milliohm shunts with visual chip preview.
SQL Formatter & Query Beautifier Studio — Format, Minify & Clean SQL
Free, private, serverless SQL formatter and query beautifier. Format, indent, and minify SQL queries in real time with keyword casing controls, multi-dialect support (PostgreSQL, MySQL, SQLite, T-SQL), and bulk processing.
SQL to Drizzle & Prisma Schema Studio
Free, private, in-browser SQL to Drizzle and Prisma Schema Studio. Convert PostgreSQL, MySQL, and SQLite DDL CREATE TABLE statements into production-ready Drizzle ORM (pgTable/mysqlTable/sqliteTable), Prisma (schema.prisma), Kysely interfaces, and Zod validation schemas. Zero server uploads.
SQLite Viewer & SQL Query Studio — In-Browser Database Explorer
Free, private, serverless SQLite viewer and SQL query studio. Open, inspect, query, and export .sqlite and .db databases in your browser with zero server uploads.
SVG Editor & Icon Maker — Free Online Vector Drawing Tool
Draw, style, and edit vector graphics and SVG icons directly in your browser. Features 8 geometric shape tools, layer management, snap-to-grid, 30 undo states, raw SVG code copying, and instant PNG/SVG export with zero server uploads.
SVG Wave Generator — Create Custom Wave Shapes & Section Dividers
Generate smooth, responsive SVG wave shapes and organic section dividers for modern web pages. Customize wave frequency, amplitude, smoothness, colors, and vertical flip with one-click SVG copying.
SVG to PNG Converter — High-Resolution Vector to Raster Rendering Tool
Convert SVG vector files to crisp high-resolution PNG images directly in your browser. Customize resolution multipliers, background transparency, and export in batch with zero server uploads.
Subdomain Takeover & Dangling DNS Analyzer — 50+ Cloud Fingerprints
Free, private, serverless in-browser subdomain takeover scanner and dangling DNS analyzer. Audit CNAME records against 50+ cloud providers via DoH to prevent hijacked domains.
Subnet Calculator & CIDR Network Planner Studio — IPv4 Architecture Tool
Free, private, serverless IPv4 subnet calculator and CIDR planner. Calculate network addresses, broadcast boundaries, usable host ranges, wildcard masks, and binary bit allocations 100% client-side.
Text Case Converter — Bulk Typographic & Code Casing Studio
Free, private, serverless text case converter with bulk support. Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case, and PascalCase — 100% client-side.
Text Diff Checker — Side-by-Side Comparison & Delta Visualizer
Free, private, serverless text diff checker. Compare two texts side by side with highlighted additions, deletions, and whitespace toggles — 100% client-side.
Text to Hex Converter — Free Online ASCII & UTF-8 Hexadecimal Tool
Convert plain text to hexadecimal and decode hex strings to text online. Instant, private, 100% client-side ASCII/UTF-8 hex converter with zero server uploads.
URL Encoder & Decoder Studio — RFC 3986 Percent-Encoding
Professional in-browser URL encoder and decoder. Convert text, parameters, and query strings to RFC 3986 percent-encoding with zero latency and 100% privacy.
UUID Generator Studio — Bulk RFC 4122 v4, v1 & Nano ID
Free, private, in-browser UUID generator with bulk support up to 1000 IDs. Generate cryptographically secure UUID v4, v1, Nano ID, and Short ID with zero latency and 100% privacy.
Unix Timestamp Converter & Epoch Time Studio — Bidirectional Date Tool
Free, private, serverless Unix timestamp converter. Bidirectionally convert between epoch seconds, milliseconds, microseconds, and human-readable UTC/local dates with live time, relative time, and bulk processing.
Web Serial & Bluetooth Hardware Terminal — In-Browser Microcontroller Console
Free, private, serverless driverless in-browser Web Serial & Bluetooth hardware terminal. Connect directly to Arduino, ESP32, STM32, and BLE devices via USB COM ports with zero installation.
WebRTC SDP Decoder & Media Inspector
Free, private, in-browser WebRTC SDP Decoder & Media Inspector. Dissect Session Description Protocol (SDP) packets, audit audio/video codecs (Opus, VP8, H.264, AV1), inspect ICE candidates (STUN/TURN), verify DTLS-SRTP fingerprints, and simulate Offer/Answer negotiation. Zero server uploads.
Webhook HMAC Signature Debugger & Verifier Studio
Free, private, serverless in-browser Webhook HMAC signature debugger and verifier. Test, calculate, and inspect signatures for Stripe, GitHub, Shopify, Slack, and custom webhooks.
XML Formatter & Minifier Studio — Pretty Print, Minify & Inspect
Free, private, in-browser XML formatter and minifier. Beautify with 2 or 4 spaces, minify payloads, inspect tag counts, and validate syntax with zero latency and 100% privacy.
XML to CSV Converter — Free Online Bulk XML Parser
Free, private, serverless XML to CSV converter with bulk support. Parse XML files, flatten nested elements, and export as CSV — 100% in your browser, no upload. 100% serverless.
XML to JSON Converter Studio — Type Inference & Attribute Mapping
Free, private, in-browser XML to JSON converter. Automatically detect numbers, booleans, and arrays with configurable attribute mapping, zero latency and 100% privacy.
YAML to JSON Converter — Free Bulk YAML Parser Online
Free, private, serverless YAML to JSON converter with bulk support. Parse YAML files and convert to JSON with configurable formatting — 100% in your browser, no upload. 100% serverless.
cURL to Code Multi-Converter
Free, private, serverless cURL to Code Multi-Converter. Transform cURL commands into idiomatic Python, JavaScript, Go, PHP, Java, C#, and Rust code. Inspect headers, test CORS endpoints, and protect sensitive API credentials with zero server uploads. No data leaves your browser — 100% client-side.
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