Developer Tools, Instantly.
39 free tools — fast, private, 100% in your browser.
Data & Formats
JSON Formatter & Validator
Pretty‑print, minify, validate JSON. Load from URL, paste, or file upload. JSONPath query support.
YAML ↔ JSON Converter
Convert between YAML and JSON with validation. Supports Kubernetes & CI/CD configs.
Timestamp / Epoch Converter
Convert Unix timestamps to human‑readable dates for multiple timezones and back.
CSV ↔ JSON Converter
Convert between CSV and JSON for APIs and data pipelines.
Env Config Parser
Convert .env files to JSON / YAML and back.
JSON → TypeScript
Generate TypeScript interfaces and types from any JSON payload.
Word to PDF Converter
Convert Word .docx files to PDF entirely in the browser. No upload to servers.
PDF Merge & Split
Merge multiple PDFs into one or split a PDF into individual pages. 100% client-side.
JSON Schema Generator
Generate JSON Schema from sample JSON data. Supports Draft-07 and Draft 2020-12.
Security & Auth
JWT Decoder & Debugger
Decode JWT tokens in the browser. Inspect header, payload, expiration, and common claims.
JWT Builder
Create and sign custom JWT tokens for testing auth flows. Supports HS256, HS384, HS512 algorithms.
Password Generator
Generate strong, random passwords with configurable length, symbols, and entropy display.
Scheduling
Networking
Text & Diff
Regex Tester
Live regex match highlighting, capture groups, and substitution with pre‑built examples.
Text Diff Viewer
Side‑by‑side or inline diff with syntax‑like highlighting for any text or code.
Text Case Converter
Convert text to camelCase, PascalCase, snake_case, kebab-case, UPPER, lower, and more.
Markdown Preview
Live Markdown editor with instant HTML preview. Supports GFM, tables, and code blocks.
SQL Formatter
Format, minify, and validate SQL queries. Supports MySQL, PostgreSQL, SQLite, and standard SQL.
GraphQL Formatter
Format, minify, and validate GraphQL queries, mutations, subscriptions, and schemas. Perfect for Apollo & Relay.
Slug Generator
Turn any title or sentence into a clean, URL-friendly slug.
Lorem Ipsum Generator
Generate placeholder text in paragraphs, sentences, or words.
Encoding
Base64 Encode / Decode
Encode and decode text and files (images) in the browser with preview.
URL Encoder / Decoder
Encode and decode URL components and query strings.
HTML Entity Encoder
Encode and decode HTML entities. Escape special characters for safe HTML output.
Number Base Converter
Convert numbers between binary, octal, decimal, hex, and arbitrary bases up to 36.
Chmod Calculator
Unix file permission calculator. Toggle rwx bits for owner, group, other. See numeric and symbolic notation.
Generators
Hash Generator
Generate SHA‑256, SHA‑512, MD5, and other hashes client‑side for text or files.
UUID Generator
Generate v4 UUIDs instantly in the browser.
QR Code Generator
Turn any text or URL into a downloadable QR code.
Color Converter & Picker
Pick colors and convert between HEX, RGB, HSL, and CSS named colors with live preview.
Image ↔ Base64
Convert images to Base64 data URIs and back. Preview and download results.
Image Compressor
Compress PNG, JPEG, WebP images in the browser. Free alternative to TinyPNG.
Code Screenshot
Generate beautiful code screenshots with syntax highlighting. Free Carbon.sh / Ray.so alternative.
SVG Optimizer
Optimize and minify SVG files. Remove metadata, editor data, and reduce file size.
Favicon Generator
Generate favicons for all platforms from any image. Apple Touch Icon, Android Chrome, PWA.
CSS Gradient Generator
Visual CSS gradient builder for linear, radial, and conic gradients. Presets, color stops, and instant CSS output.
100 % Client-Side
Nothing leaves your browser. Zero server calls.
Privacy-First
No tracking, no cookies, no data collection.
Works Offline
Static site — works after first load, even without internet.