Online Dev Tool – Free Online Developer Utilities
Format, Convert, Encode, Decode & Debug Easily. All tools run entirely in your browser — no data leaves your machine.
Data
JSON Formatter
Format, validate, and minify JSON data instantly.
Data
Base64 Encode / Decode
Encode or decode Base64 strings online.
Data
URL Encode / Decode
Encode or decode URL components.
Text
Case Converter
Convert text between camelCase, snake_case, and more.
Data
Timestamp Converter
Convert Unix timestamps to human-readable dates.
Data
UUID Generator
Generate random UUIDs (v4) with one click.
Data
Hash Generator
Generate MD5, SHA-1, SHA-256 hashes from text.
API
JWT Decoder
Decode and inspect JWT tokens without verification.
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HTTP Status Codes
Quick reference for HTTP status codes and meanings.
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Regex Tester
Test and debug regular expressions in real time.
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Text Diff Checker
Compare two texts and highlight the differences.
Text
Lorem Ipsum Generator
Generate placeholder text for your designs.