Developer tools
JSON, Base64, regex, and other code utilities.
All Developer tools
JSON Formatter
Format, validate, and minify JSON
Base64 Encoder/Decoder
Encode and decode Base64 text
Hash Generator
MD5, SHA-1, SHA-256, SHA-512 hashes
URL Encoder / Decoder
Encode and decode URL-safe text
JWT Decoder
Decode and inspect JSON Web Tokens
Markdown ↔ HTML Converter
Convert between Markdown and HTML with live preview
Regex Tester
Test, debug, and learn regular expressions
CSV ↔ JSON Converter
Convert between CSV and JSON, both ways
YAML ↔ JSON Converter
Convert between YAML and JSON instantly
Timestamp Converter
Convert Unix epoch to human dates and back
Number Base Converter
Binary, octal, decimal, hex with live sync
Image to Base64
Encode images to Base64 data URIs and decode back
Meta Tag Generator
SEO + Open Graph + Twitter meta tags with live preview
Slug Generator
Turn any title into a clean URL slug
HTML Minifier & Beautifier
Minify HTML to shrink it, or beautify to format it
JSON to XML Converter
Convert JSON to XML and XML back to JSON
CSS Minifier & Beautifier
Minify CSS to shrink it, or beautify to format it
Cron Expression Generator
Build and understand cron schedules in plain English
HTTP Status Codes
Searchable reference for every common status code
URL Parser
Break any URL into its parts
UTM Builder
Build trackable campaign URLs
Chmod Calculator
Unix file permissions to octal
JSON Compare
Diff two JSON objects
JWT Generator
Create and sign JSON Web Tokens
HMAC Generator
Generate HMAC signatures
HTML Entity Encoder
Encode and decode HTML entities
Data URI Encoder
Convert text and files to data URIs
Query String Parser
Parse and build URL query strings
MIME Type Lookup
Find the MIME type for any file
User Agent Parser
Decode any browser User-Agent
CSS Clamp Generator
Fluid responsive sizes with clamp()
CSS Specificity Calculator
Score any CSS selector
JSON Key Sorter
Sort JSON object keys alphabetically
JSON Lines Converter
Convert between JSON and JSONL
YAML Validator
Validate and format YAML
JSON to TypeScript
Generate TypeScript types from JSON
XML Formatter
Format or minify XML
Basic Auth Header Generator
Build HTTP Basic Auth headers
HTTP Headers Parser
Parse raw HTTP headers
Content-Type Parser
Break down a Content-Type header
robots.txt Tester
Test if a URL is allowed or blocked
cURL to Fetch Converter
Turn curl commands into fetch()
File Hash Checker
Verify file checksums locally
SQL Formatter
Format and beautify SQL queries
JSON Schema Validator
Validate JSON against a schema
JSONPath Tester
Query JSON with JSONPath
JavaScript Minifier
Minify JS to shrink your files
Text Encrypt and Decrypt
Encrypt text with a password
Google Search Preview
Preview your search snippet
Open Graph Preview
Preview social share cards
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