Diff checker, JSON formatter, JWT decoder, AES encryptor, JavaScript playground, Base64 encoder, image editor, PDF merger, webhook inspector, database clients, and more — all in a focused dark-mode UI, most running entirely in your browser.
Parse, transform, and inspect text, tokens, and data formats
Side-by-side line diff with syntax highlighting across text, JSON, SQL, YAML, HTML, and more.
Format, minify, and validate JSON with adjustable indentation. Catches syntax errors instantly.
Decode JWT payloads, verify signatures with a secret or public key, and generate new signed tokens.
Base64 encode or decode and URL encode or decode strings — both directions, no server calls.
AES-256 encryption, MD5/SHA hashing, HMAC signatures, ROT-13, Caesar, and XOR — runs entirely in-browser.
Monaco-powered JavaScript editor with live console output, async support, and shareable snippet links.
Edit, convert, and process images and PDFs
Test webhooks, inspect HTTP requests, and send email
Query MySQL and PostgreSQL without installing a local client
Handy tools for everyday developer tasks
Click a map or search an address to extract GPS coordinates in decimal degrees or DMS format. One-click copy.
Convert colors between HEX, RGB, RGBA, HSL, and HSLA with a visual picker.
Translate cron expressions into plain English and preview the next run times.
Convert between JSON, CSV, YAML, XML, timestamps, and more
Convert Unix timestamps to readable dates and back, in seconds or milliseconds.
Convert cURL commands to JavaScript fetch, Axios, Python requests, and PHP code.
Convert JSON arrays to CSV, flattening nested objects into columns.
Convert CSV to JSON with header detection, number and boolean typing, and delimiter auto-detect.
Turn JSON into clean, human-readable YAML for config files.
Parse YAML config files into valid JSON, including multi-document files and merge keys.
Convert JSON to well-formed XML with a custom root element.
Convert XML documents to JSON, keeping attributes and detecting numbers and booleans.
Format, validate, and minify code and data
Structurally compare two JSON documents — added, removed, and modified keys with full paths.
Beautify, validate, and minify XML documents.
Format and minify SQL for MySQL, PostgreSQL, SQL Server, SQLite, and more.
Minify JavaScript, CSS, and HTML to cut file size.
Count, convert, and clean up text
Test regular expressions live with match highlighting, capture groups, and replace preview.
Convert text to UPPER, lower, Title, camelCase, snake_case, kebab-case, and more.
Count words, characters, sentences, and paragraphs, with reading time and keyword density.
Turn titles into clean, SEO-friendly URL slugs with custom separators and stop-word removal.
Generate test data, passwords, IDs, QR codes, and CSS
Generate RFC 4122 v4 UUIDs in bulk with uppercase, hyphen, and brace options.
Generate strong random passwords with the Web Crypto API and a strength meter.
QR codes for URLs, WiFi, UPI, email, phone, SMS, text, and contact cards.
Visually build layered CSS box shadows and glassmorphism effects, then copy the CSS.
Generate realistic mock JSON for API testing and prototypes — up to 1,000 objects.
Generate dummy test data as CSV, JSON, or SQL INSERTs — up to 1,000 rows.
Convert, resize, and compress images right in your browser
Convert images between PNG, JPG, and WebP — batch, in your browser.
Resize images by pixels or percentage — batch, with aspect ratio lock.
Compress JPG, PNG, and WebP images in bulk and see exactly how much you save.
Turn any image into a full favicon set: .ico, PNG sizes, Apple touch icon, and web manifest.
Combine up to 20 images into one PDF — reorder pages, pick page size and margins.
Resize SVG width and height without cropping, then export SVG or PNG.
Meta tags, robots.txt, schema markup, and server config helpers
Find the correct MIME type for any file extension, and the extensions for any MIME type.
Generate Open Graph and Twitter Card meta tags for rich link previews.
Build a robots.txt with crawler rules, sitemaps, and presets like blocking AI bots.
Generate Apache .htaccess rules: HTTPS and www redirects, caching, gzip, security headers.
Validate JSON-LD structured data against required and recommended schema.org properties.
Measure the text-to-HTML ratio of a page and spot bloated markup that hurts SEO.
DNS, IP, HTTP, and subnet utilities
Searchable reference of HTTP status codes with explanations, from 1xx to 5xx.
Calculate IPv4 and IPv6 subnets: network, broadcast, usable range, masks, and host counts.
Look up A, AAAA, MX, TXT, NS, CNAME, SOA, CAA, and other DNS records over DNS-over-HTTPS.
See your public IPv4 and IPv6 address with location and ISP, or look up any IP.
Trace redirects hop by hop, inspect response headers, and grade a site's security headers.
Send GET, POST, PUT, PATCH, and DELETE requests with headers, auth, and a body — like a lightweight Postman.
Password hashing and certificate inspection
Code editors and live sandboxes that run in your browser
Open any tool and start working in seconds. No downloads, no configuration, no local dependencies.
Cryptography, encoding, diffing, and JS execution all run locally in your browser — your data never hits our servers.
SMTP passwords and database credentials are encrypted at rest. DB connections are scoped to your session only.
All 59 tools are free to use. Just sign in for the ones that save your data — SSH connections, database credentials, email sending.
The Diff Checker renders side-by-side diffs with syntax highlighting across JSON, SQL, YAML, HTML, and plain text. The JSON Beautifier formats and validates JSON with configurable indentation and byte-count readout. The JWT Tools panel decodes any token, verifies HMAC or RSA signatures, and generates signed JWTs — essential for API debugging.
The Base64 & URL Encoder converts both directions instantly. The Encrypt / Decrypt tool covers AES-256-CBC/ECB/CTR/OFB encryption, MD5/SHA-1/SHA-256/SHA-384/SHA-512/SHA-3 hashing, HMAC-SHA256/SHA-512 signatures, and classic ciphers (ROT-13, Caesar, XOR) — all computed locally with zero server upload.
The JS Playground pairs a Monaco editor with a sandboxed execution environment. Console output (log, warn, error, info) is streamed live, async/Promise code is fully supported, and any snippet can be shared via a single URL — ideal for quick prototypes and debugging sessions.
The Image Editor processes crop, resize, rotate, flip, brightness, contrast, greyscale, and format conversion in real time without leaving the browser. The PDF Merger combines multiple PDFs, compresses output with Ghostscript, and extracts raw text content.
The Webhook Tester generates a unique endpoint URL instantly and pushes every incoming HTTP request — method, headers, query string, and body — to the UI in real time via WebSockets. Perfect for testing Stripe webhooks, GitHub events, or any third-party callback. The Email Tool connects to any SMTP server you own, supports HTML templates built with a rich-text editor, and handles bulk mailing lists with per-recipient personalization tokens.
The MySQL and PostgreSQL connectors provide a full schema browser, DDL/DML SQL editor, and inline results table — no local client installation required. The Lat/Long Picker lets you click a Google Map, search any address, or type coordinates manually to extract GPS values in decimal degrees or DMS format, with one-click copy for lat, lng, combined, and JSON.
No credit card required, every tool is free to use. Sign in only for tools that need to save your data — database connectors, SSH, and email sending.