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Developer
JSON, regex, encoders, formatters — utilities for everyday coding.
17 tools · sorted by popularity
JSON Formatter & Validator
Paste JSON to format, validate, or minify — runs entirely in your browser.
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Base64 Encoder / Decoder
Encode to Base64 or decode it back — handles UTF-8 correctly.
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JSON ↔ CSV Converter
Convert between JSON and CSV — round-trip safe, runs locally.
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Regex Tester
Build and test JavaScript regular expressions with live highlighting.
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UUID / GUID Generator
Generate cryptographically random UUID v4 identifiers.
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JSON ↔ YAML Converter
Switch between JSON and YAML — useful for Kubernetes, CI configs, and API specs.
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JWT Decoder
Paste a JWT to inspect its header and payload. Decoded locally.
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Markdown ↔ HTML Converter
Convert between Markdown and HTML with a live preview.
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UTM Link Builder
Add UTM parameters to a URL to track campaigns in Google Analytics and other tools.
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HTML Formatter & Minifier
Beautify or minify HTML — useful for emails, snippets, and copy-pasted markup.
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SQL Formatter
Make tangled SQL readable — supports common dialects.
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Cron Expression Generator
Build cron expressions and read them in plain English.
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URL Encoder / Decoder
Encode or decode URL components and query strings.
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.gitignore Generator
Pick your stacks to get a sensible .gitignore.
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XML Formatter & Validator
Pretty-print and validate XML.
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CSS Formatter & Minifier
Format CSS with consistent indentation or strip it down for production.
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JavaScript Formatter & Minifier
Format or minify JavaScript — handy for inspecting bundles or formatting snippets.
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