Developer Tools
Format, encode, decode and debug.
JSON Formatter
Format, validate and minify JSON with syntax highlighting and clear error messages showing exactly where invalid JSON breaks.
Base64 Encode/Decode
Encode text or files to Base64 and decode Base64 back, with full Unicode support and URL-safe mode. Runs entirely in your browser.
URL Encode/Decode
Encode text for safe use in URLs or decode percent-encoded strings, with component and full-URL modes and a reference of common encodings.
HTML Encode/Decode
Convert special characters to HTML entities and decode entities back to text. Essential for displaying code and user input in web pages.
JWT Decoder
Paste a JWT to see its decoded header and payload with human-readable timestamps. Decoding happens locally - your token never leaves the page.
UUID Generator
Generate cryptographically random UUID v4 identifiers, one at a time or in bulk, with uppercase, hyphenless and quoted formats.
Hash Generator
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from text or files, computed locally in your browser using the Web Crypto API.
Regex Tester
Test regular expressions against sample text with live match highlighting, capture groups, flags and a quick-reference cheat sheet.
Unix Timestamp
Convert Unix timestamps to human-readable dates and dates back to epoch seconds or milliseconds, in your time zone and UTC, with a live clock.
CSS Minifier
Minify CSS to shrink file size or beautify minified CSS to make it readable again - with size savings shown. Works entirely offline.
Markdown to HTML
Write or paste Markdown and get clean HTML with a live rendered preview. Supports tables, code blocks and GitHub-flavored syntax.
JSON to CSV
Convert JSON arrays to CSV instantly in your browser, with nested objects flattened to dot-notation columns and proper RFC 4180 quoting. Download or copy.
CSV to JSON
Convert CSV data to JSON in your browser. Handles quoted fields and embedded commas correctly, detects numbers and booleans, and downloads clean JSON.
SQL Formatter
Format messy SQL into readable, consistently indented queries. Supports PostgreSQL, MySQL, SQLite, T-SQL and BigQuery dialects, plus a minify mode.
Cron Generator
Build cron expressions with dropdowns, or paste one to see it explained in plain English with its next five run times. No more guessing the field order.
PX to REM
Convert px to rem and rem to px instantly against any root font size, with a reference table of common values for CSS and Tailwind work.
XML Formatter
Format messy XML with proper indentation, validate it with clear error messages, or minify it for production - all locally in your browser.
XML to JSON
Convert XML documents to clean JSON in your browser, with attribute handling options and pretty-printed output you can copy or download.
JSON to YAML
Convert JSON to clean, readable YAML instantly in your browser. Ideal for Kubernetes manifests, CI configs and OpenAPI specs.
YAML to JSON
Convert YAML to JSON and validate it at the same time - clear error messages with line numbers when the YAML is malformed. Runs in your browser.
JavaScript Minifier
Minify JavaScript with real compression and mangling (powered by Terser) or beautify minified code back to readable form. Shows exact size savings.
HTML Formatter
Tidy up messy HTML with consistent indentation or minify it for production, with size savings shown. Everything runs locally in your browser.
HTML to Markdown
Convert HTML to clean Markdown - headings, lists, links, tables and code blocks all preserved. Paste rich text or raw HTML and copy the result.
Markdown Table Generator
Build Markdown tables in a visual editor - add rows and columns, set alignment, paste from a spreadsheet - and copy perfectly formatted Markdown.
What Is My IP
See your public IP address instantly, with IPv4 and IPv6 shown separately and a plain-English explanation of what your IP reveals about you.
What Is My User Agent
See your browser user agent string instantly, with the browser, version, engine and operating system parsed out and explained.
DNS Lookup
Look up DNS records for any domain: A, AAAA, MX, TXT, CNAME, NS and more, resolved over encrypted DNS with response times shown.
Subnet Calculator
Calculate network address, broadcast, host range and usable hosts from any IPv4 address and CIDR prefix or netmask - with the binary breakdown shown.
Bcrypt Generator
Generate bcrypt password hashes with your chosen cost factor and verify passwords against existing hashes - computed locally, nothing sent anywhere.
JWT Generator
Create signed JWTs for testing: edit the payload, set expiry, sign with your secret using HS256 via the Web Crypto API - entirely in your browser.
Chmod Calculator
Convert Linux file permissions between checkboxes, octal (755) and symbolic (rwxr-xr-x) notation instantly, with common permission presets explained.
URL Parser
Paste a URL and see every part broken out: protocol, host, port, path, query parameters in a table, and fragment - with one-click decoding.
Curl Converter
Paste a curl command and get working code: JavaScript fetch, Python requests or Node axios - headers, body, method and auth all carried over.
Meta Tag Generator
Generate every meta tag your page needs: title, description, canonical, Open Graph and Twitter cards - with live SERP and social share previews.
Slug Generator
Turn any title into a clean, lowercase, hyphenated URL slug. Handles accents, symbols and stop words, with custom separator options.