Developer Tools

Encoders, formatters, decoders, and generators for developers.

Use formatters to make structured text readable, validators to find syntax errors, and encoders only when a receiving system expects that format. Each tool explains its input and output on its own page. Avoid pasting secrets into live network lookup tools, which call external services.

Read the practical guide for this category.

Formatting

JSON Formatter & Validator

Beautify, minify, and validate JSON with clear error messages.

CSV ⇄ JSON Converter

Convert CSV to JSON and JSON back to CSV, both directions.

Markdown Preview

Write Markdown and see the rendered result live, side by side.

JSON ⇄ YAML Converter

Convert JSON to YAML and YAML to JSON with error reporting.

CSS Minifier & Beautifier

Minify CSS to shrink it or beautify it for readability.

Markdown Table Generator

Build GitHub-flavored Markdown tables in a visual grid and copy the code.

LaTeX Table Generator

Design a table visually and copy a ready-to-paste LaTeX tabular environment.

HTML Table Generator

Create an HTML table in a visual grid and copy clean, semantic markup.

Format and beautify SQL queries for MySQL, PostgreSQL and more.

Beautify or minify XML and catch mismatched tags.

Code Beautifier

Beautify and indent HTML, CSS and JavaScript.

Encoding

Base64 Encoder & Decoder

Encode text to Base64 or decode Base64 back to text, with URL-safe support.

Decode and inspect the header and payload of a JSON Web Token.

URL Encoder & Decoder

Percent-encode text for safe use in URLs, or decode encoded URLs back to text.

HTML Entity Encoder / Decoder

Escape and unescape HTML entities like &, < and >.

String Escape / Unescape

Escape and unescape backslash sequences like \n, \t and \".

GZip Compressor

Compress text to gzip (Base64) and decompress it back.

Generators

QR Code Generator

Turn any text or link into a downloadable QR code image.

Password Generator

Generate strong, random passwords with configurable length and character sets.

Generate cryptographically random version-4 UUIDs in bulk.

Utilities

Test regular expressions live, see every match and capture group, and preview replacements.

Cron Expression Parser

Break down a crontab expression into fields and preview the next run times.

Chmod Calculator

Convert Unix file permissions between octal and rwx symbolic notation.

JSONPath Tester

Run JSONPath expressions against JSON and see the matches.

Network

IP Address Lookup

Find the location, ISP and network details of any IP address.

Look up A, AAAA, CNAME, MX, TXT, NS and SOA records for any domain.

Security

Compute SHA-1, SHA-256, SHA-384, and SHA-512 hashes of any text.

Editor

LaTeX Math Symbols Cheatsheet

Searchable table of LaTeX math symbols and their commands. Click to copy.

LaTeX Equation Editor

Write LaTeX math with a live preview and a click-to-insert symbol palette.

Related categories

Finance & Investment Unit Converters Color Tools Text Tools Date & Time Currency Health & Fitness Image Tools PDF Tools Everyday Info