All developer tools
Every tool in this list runs entirely in your browser. No data ever leaves your device. Pick a category to jump straight to the right utility.
Encoding tools
Convert data between text-safe and binary forms β Base64, URL encoding, JSON escapes, Unicode, JWT inspection, Morse.
Base64 Encoder / Decoder
Encode and decode text or files using Base64 encoding
URL Encoder / Decoder
Encode and decode URL components and full URLs
Unicode Converter
Convert text to Unicode code points and vice versa
JSON Escape / Unescape
Escape and unescape strings for use in JSON
Morse Code Converter
Encode text into Morse code or decode Morse code back to text. Supports International Morse (ITU) including letters, digits, and punctuation.
JWT Decoder & Security Auditor
Decode and inspect JSON Web Tokens with client-side security checks for none algorithm, expiry, audience, issuer, and risky claim setups.
Crypto tools
Hashing, HMAC, and AES utilities you can verify locally before shipping into your application.
Time tools
Convert Unix timestamps, reverse-generate cron expressions from natural language, and inspect upcoming run timelines without leaving the page.
Format tools
Pretty-print and minify JSON, SQL, XML, YAML/.properties, and compare structured payloads for review and debugging.
JSON Formatter / Validator
Format, minify and validate JSON data
SQL Formatter
Format and beautify SQL queries
XML Formatter
Format, minify and validate XML documents
YAML β Properties Converter
Convert between YAML and Java .properties format
Structured Data Diff
Compare JSON, YAML, and XML by normalizing them into a single structure and highlighting field-level differences.
Dev tools
Practical daily utilities: regex flow analysis, UUIDs, Nginx snippets, request conversion, Docker generation, mock data, and i18n debugging.
Regex Tester
Test regex patterns, inspect a token-by-token flow view, and spot likely backtracking or ReDoS risks before they hit production.
Nginx Config Generator
Generate nginx configuration files by selecting options. Supports SSL, reverse proxy, caching, security headers, and more.
UUID / ULID Generator
Generate UUIDs (v1, v4, v7) and ULIDs in bulk. UUID v7 is timestamp-prefixed and lexically sortable β great for database keys.
Number to Chinese Capital
Convert numbers to formal Chinese capital characters (ε£Ήθ΄°ε) used on invoices, contracts, and financial documents. Also produces simple (lowercase) Chinese.
Dockerfile / Compose Generator
Generate production-minded Dockerfile and docker-compose templates with multi-stage builds, non-root runtime users, and optional Prisma/Postgres/Redis blocks.
Mock Data Generator
Turn JSON samples into realistic mock data arrays with smart field inference for email, avatar, ids, totals, timestamps, and more.
cURL / Fetch / Axios Converter
Parse cURL commands into structured requests and convert them to Fetch, Axios, or Python requests code.
i18n Missing Key Detector
Compare locale JSON files, find missing keys, and flag interpolation parameter mismatches before they ship to users.
Coredump Analyzer
Upload a core dump for browser-side heuristic analysis: file format, crash signals, likely fault classes, and triage hints before you open gdb.
Heapdump Analyzer
Inspect Node / V8 heap snapshots in the browser, summarize node counts, dominant object types, and first-pass memory leak hints.
Visual tools
Generate QR codes, render Graphviz diagrams, prototype layouts, optimize SVGs, and translate colors across formats.
QR Code Generator
Generate and scan QR codes instantly
Graphviz Viewer
Render Graphviz DOT language diagrams as SVG
Color Converter & Picker
Convert colors between HEX, RGB, HSL, HSV, and CMYK formats. Includes a color picker and shade preview.
CSS Layout Sandbox
Prototype Grid and Flexbox layouts visually, tweak item spans, and export responsive HTML/CSS snippets.
SVG Optimizer & Path Extractor
Clean raw SVG markup, inspect path data, and generate React/Vue icon component boilerplate plus path animation CSS.