Developer Tools

Free online developer tools including JSON formatter, Base64 encoder, regex tester, UUID generator, and more. 25 powerful tools for developers.

JSON Formatter

Format, beautify, and validate JSON instantly. Paste raw JSON and get a clean, indented, human-readable output with syntax error detection.

JSON Minifier

Minify and compress JSON by removing whitespace and comments. Reduce JSON payload size instantly for faster API responses and smaller storage footprint.

JSON to CSV Converter

Convert JSON arrays to CSV format instantly. Transform nested JSON data into spreadsheet-ready CSV files with automatic header detection.

JSON to YAML Converter

Convert JSON to YAML format instantly online. Transform JSON config files, API schemas, and data structures into clean, readable YAML syntax.

Base64 Encoder / Decoder

Encode text or decode Base64 strings instantly online. Convert between plain text and Base64 encoding for data URLs, authentication headers, and API tokens.

URL Encoder / Decoder

Encode or decode URLs and query strings instantly. Convert special characters to percent-encoding and back for safe URL transmission and debugging.

HTML Encoder / Decoder

Encode special characters to HTML entities or decode HTML entities back to plain text. Prevent XSS and display HTML code safely in web pages.

UUID Generator

Generate UUID v1, v4, and v5 universally unique identifiers instantly. Create single or bulk UUIDs for databases, APIs, and distributed systems.

Regex Tester

Test and debug regular expressions in real time. Highlights matches, capture groups, and supports JavaScript regex flags for instant pattern validation.

JWT Decoder

Decode and inspect JSON Web Tokens (JWTs) instantly. View header, payload, and signature without a secret key. Debug authentication tokens safely.

Hash Generator

Generate cryptographic hashes for any text using MD5, SHA-1, SHA-256, SHA-512, and more. Verify data integrity and create checksums instantly online.

HTML to Markdown Converter

Convert HTML to clean Markdown syntax instantly. Transform web content, blog posts, and documentation from HTML tags to readable Markdown format.

Markdown to HTML Converter

Convert Markdown to HTML instantly online. Transform README files, blog posts, and documentation written in Markdown into clean HTML output.

CSS Minifier

Minify and compress CSS code instantly online. Remove whitespace, comments, and redundant code to reduce CSS file size and improve page load speed.

JavaScript Minifier

Minify and compress JavaScript code online. Remove whitespace, comments, and shorten variable names to reduce JS bundle size and improve load time.

HTML Minifier

Minify HTML by removing whitespace, comments, and optional tags. Reduce HTML document size to improve page load speed and server response times.

SQL Formatter

Format and beautify SQL queries instantly online. Clean up minified or messy SQL with proper indentation, keyword capitalisation, and clause alignment.

XML Formatter

Format and beautify XML documents instantly online. Validate XML structure, add proper indentation, and make raw XML human-readable with one click.

Cron Job Generator

Free cron job generator with visual builder. Create cron expressions for Linux crontab, AWS, GitHub Actions, Kubernetes. See next run times instantly.

Color Converter

Convert colors between HEX, RGB, RGBA, HSL, HSLA, and HSV formats instantly. Pick colors visually and get all format values at once for CSS and design work.

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and back. Supports seconds and milliseconds timestamps with timezone conversion for debugging and development.

IP Address Lookup

Look up any IP address to find its geolocation, ISP, country, city, and timezone. Instantly check your own IP or investigate any public IP address.

HTTP Status Codes

Complete HTTP status code reference with explanations, use cases, and examples. Look up any HTTP response code from 1xx informational to 5xx server errors.

Diff Checker

Compare two texts or code files side by side and highlight differences. Find added, removed, and changed lines instantly with colour-coded diff output.

Code Beautifier

Beautify and format code in JavaScript, TypeScript, HTML, CSS, JSON, and more. Auto-indent and clean up messy code with configurable style options.

JSONPath Tester

Test JSONPath expressions against JSON data instantly. Paste your JSON and a JSONPath query to see matched results highlighted in real time.

HTML Preview

Paste HTML, CSS, and JavaScript and see a live preview instantly in a sandboxed iframe. Like a lightweight CodePen, no sign-up needed.

Chmod Calculator

Calculate Unix chmod permissions visually. Use checkboxes for read, write, execute for owner, group, and other. Get numeric (755) and symbolic (rwxr-xr-x) output.

JSON to TypeScript

Paste JSON and instantly generate TypeScript interfaces. Handles nested objects, arrays, and optional fields. Copy the generated types for your project.

SVG Optimizer

Paste SVG code and remove unnecessary attributes, comments, and metadata. See the size reduction percentage and copy the optimized SVG.

JSON Viewer

View JSON as an interactive collapsible tree. Paste JSON and explore nested objects and arrays visually. Click nodes to expand or collapse. Search within the tree.

HTML Viewer

Paste HTML code and see a live rendered preview alongside the source. Instantly visualise how your markup looks in a browser — no server needed.

CSS Formatter

Beautify and format CSS code with proper indentation and line breaks. Paste minified or messy CSS and get clean, readable output instantly.

IP to Binary Converter

Convert IPv4 addresses to binary and back. Enter an IP address to see each octet in binary format, or enter binary to get the decimal IP.

Epoch Converter

Convert epoch/unix timestamps to human-readable dates and back. See the current epoch live. Convert in seconds or milliseconds across multiple time zones.