Developer · Developer
JSON Formatter & Validator
Format, validate, and minify JSON locally in your browser.
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Developer Tools
Decode, compare, convert, and inspect technical text and data.
Developer tools cover small inspection and formatting jobs that come up during debugging, prototyping, and documentation. They are intentionally lightweight and many run locally in the browser, which keeps quick checks fast and avoids unnecessary server round trips.
Popular tools
Common starting points in this category.
Developer · Developer
JSON Diff
Compare two JSON values structurally instead of by formatting.
Use toolDeveloper · Developer
JWT Decoder
Decode JWT header and payload locally without verifying the signature.
Use toolDeveloper · Developer
Hash Generator
Generate SHA-256, SHA-384, or SHA-512 hashes locally with Web Crypto.
Use toolBrowse by task
JSON & Data
Format, compare, and convert structured data snippets.
Encoding & Security
Encode, decode, inspect tokens, and generate hashes locally.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to UTF-8 text.
Open toolURL Encoder / Decoder
Encode or decode URL component text locally.
Open toolJWT Decoder
Decode JWT header and payload locally without verifying the signature.
Open toolHash Generator
Generate SHA-256, SHA-384, or SHA-512 hashes locally with Web Crypto.
Open toolFile Checksum
Calculate SHA checksums for a local file without uploading it.
Open toolFormatting
Clean up code and query text without executing it.
Conversion & Utilities
Handle common developer conversion and accessibility checks.
Number Base Converter
Convert integers between binary, octal, decimal, and hexadecimal.
Open toolHTML Entity Encoder / Decoder
Encode text as HTML entities or decode entities back to readable text.
Open toolColor Contrast Checker
Check foreground and background color contrast with WCAG-oriented guidance.
Open toolAll developer tools
12 tools in this category.
Developer · Developer
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to UTF-8 text.
Use toolDeveloper · Developer
URL Encoder / Decoder
Encode or decode URL component text locally.
Use toolDeveloper · Developer
JWT Decoder
Decode JWT header and payload locally without verifying the signature.
Use toolDeveloper · Developer
Hash Generator
Generate SHA-256, SHA-384, or SHA-512 hashes locally with Web Crypto.
Use toolDeveloper · Developer
JSON Formatter & Validator
Format, validate, and minify JSON locally in your browser.
Use toolDeveloper · Developer
JSON Diff
Compare two JSON values structurally instead of by formatting.
Use toolDeveloper · Developer
YAML to JSON Converter
Convert simple flat YAML objects to JSON and JSON objects to YAML.
Use toolDeveloper · Developer
SQL Formatter
Format or minify SQL query text locally without executing it.
Use toolDeveloper · Developer
File Checksum
Calculate SHA checksums for a local file without uploading it.
Use toolDeveloper · Converter
Number Base Converter
Convert integers between binary, octal, decimal, and hexadecimal.
Use toolDeveloper · Converter
HTML Entity Encoder / Decoder
Encode text as HTML entities or decode entities back to readable text.
Use toolDeveloper · Developer
Color Contrast Checker
Check foreground and background color contrast with WCAG-oriented guidance.
Use tool