JSON Formatter
Beautify, validate and minify JSON and spot syntax errors with a clear tree view.
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Developer Tools
Format JSON, test regex, encode data and dozens of other coding helpers.
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auth
base64
beautify
browser
code
cron
css
database
decode
developer
encode
format
generator
guid
html
javascript
json
jwt
playground
regex
regular expression
schedule
sql
support
test
token
url
uuid
validate
Base64 Encode / Decode
Encode text or files to Base64 and decode Base64 back to plain text in the browser.
Can I Use
Check which browsers support a given HTML, CSS or JavaScript feature.
Code Beautifier
Format and validate JSON, XML, HTML, CSS, SQL and more, plus many developer utilities.
Cron Expression Helper
Write and understand cron schedule expressions with a live plain-English preview.
JSFiddle
A classic front-end playground for quickly testing and sharing HTML, CSS and JS snippets.
JWT Debugger
Decode, verify and inspect JSON Web Tokens and their claims.
Online Code Playground
Write and run HTML, CSS and JavaScript together and share the result with a link.
Regex Tester
Build and debug regular expressions with live match highlighting and token explanations.
SQL Formatter
Beautify and reformat messy SQL queries so they are easy to read.
URL Encoder / Decoder
Percent-encode and decode URLs and query strings safely.
UUID Generator
Generate random version 4 UUIDs one at a time or in bulk.