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Quick and useful devtools.
Format, validate, convert and debug with tools built for everyday development.
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JSON Formatter
Format, validate, and pretty-print JSON with error detection.
Format & Convert -
JWT Decoder
Decode and inspect JSON Web Token claims without a secret.
Auth & IDs -
Regex Tester
Test and debug regular expressions with live match highlighting.
Regex -
Timestamp Converter
Convert Unix timestamps to human-readable dates and back.
Date & Time
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Recent articles
View all articles →Cron Expression Examples: Syntax, Patterns, and Common Schedules
A practical reference for cron expressions - how each field works, the special characters that make cron flexible, and real-world schedule examples you can copy directly.
Cron8 min readRegex Email Validation Patterns: What Works and What Doesn't
A developer's guide to email validation with regex - from the simple pattern that covers 99% of cases to RFC 5322 edge cases, plus JavaScript examples you can use today.
Regex6 min readJWT Tokens Explained: Structure, Claims, and Security
A practical breakdown of JSON Web Tokens - how the three-part structure works, what claims mean, how signatures are verified, and when to use JWTs instead of sessions.
JWT6 min read
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Format & Convert
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JSON Formatter
Format, validate, and pretty-print JSON with error detection.
Format & Convert -
JSON to YAML
Convert JSON objects to clean YAML instantly.
Format & Convert -
YAML to JSON
Convert YAML documents back to valid JSON.
Format & Convert -
JSON to CSV
Flatten JSON arrays into clean, spreadsheet-ready CSV.
Format & Convert -
CSV to JSON
Turn CSV rows into structured JSON objects.
Format & Convert
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