Developer Tools
Formatters, encoders, parsers, and coding utilities.
Format JSON, encode Base64, decode JWTs, test regex, and convert timestamps—everyday debugging helpers.
Popular in Developer Tools
All Developer Tools tools
JSON Formatter
Format, validate, and minify JSON.
Base64 Encoder / Decoder
Encode or decode Base64 strings instantly.
URL Encoder / Decoder
Percent-encode or decode URL components safely.
JWT Decoder
Decode JWT header and payload without verifying signatures.
UUID Generator
Generate UUID v4 values in batches.
Regex Tester
Test regular expressions with live match highlighting.
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates.
Cron Expression Parser
Explain cron expressions in plain English.
Markdown to HTML
Convert Markdown to HTML with a live preview.
HTML / CSS / JS Minifier
Minify HTML, CSS, or JavaScript by stripping comments and whitespace.
YAML Formatter
Validate and pretty-print YAML documents.
XML Formatter
Pretty-print and validate XML.
SQL Formatter
Beautify SQL queries for readability.
CSS Beautifier
Format messy CSS with indentation.
JavaScript Beautifier
Format minified or messy JavaScript.
JSON to CSV
Convert a JSON array of objects into CSV.
JSON Diff
Compare two JSON documents side by side.
Number Base Converter
Convert between binary, octal, decimal, and hex.
JWT Encoder
Build an unsigned or HS256 JWT from header and payload.
NanoID Generator
Generate URL-safe NanoID strings.
ASCII Converter
Convert text to ASCII codes and back.
HTML Entity Encoder
Encode and decode HTML entities.
CSS Unit Converter
Convert px, rem, and em at a chosen root size.
Regex Cheatsheet
Quick reference for common regex tokens.
UUID Validator
Check if a string is a valid UUID.
Markdown Table Generator
Build a Markdown table from CSV-like input.
Base64URL Encoder
Encode and decode Base64URL (JWT-safe) strings.
Query String Builder
Build a URL query string from key/value pairs.
Binary Fraction Helper
Convert simple decimals toward binary fractions.
Chmod Calculator
Convert Unix permission flags to octal chmod.
Cron Next Runs
Explain a 5-field cron and show example cadence.
JSON Minify
Minify JSON into a single compact line.
CSS Minify
Minify CSS by stripping comments and extra spaces.
JS Minify Lite
Lightweight JS whitespace minify for snippets.
FAQ
- What developer tools tools are free on Odin?
- Every tool in Developer Tools is free to use—open a tool and get a result without creating an account.
- How do I find the right developer tools tool?
- Browse the list below, use the catalog, or press ⌘K to search by name or task.