Free · Browser-Based · No Signup · Instant Results
Free Online Developer Tools That Open Fast and Get Out of Your Way
Toolkit.Fun is a lightweight collection of browser-based tools for developers, operators, and technical teams. Start with a fast JSON formatter that can pretty-print, validate, and minify JSON locally without sending your data to a server.
10Live Tools
100%Browser-based
0Signup Required
💻 Available Developer Tools
Built for common daily tasks: inspect data, clean payloads, and reduce friction during debugging.
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JSON Formatter
Format multi-line JSON, minify one-line payloads, validate syntax, and inspect nested structures directly in the browser.
Base64 Encoder
Encode or decode Base64 locally for payload, token, and API debugging.
URL Encoder
Encode unsafe URL characters and decode percent-encoded strings.
Unix Timestamp Converter
Convert Unix time to readable dates and back instantly.
JWT Decoder
Decode JWT headers and payloads in the browser.
Regex Tester
Quickly test patterns and inspect matches against sample text.
HTML Escape
Escape or unescape HTML entities for templates and docs.
JSON String Escape
Convert plain text into JSON-safe strings and back.
Text Diff Checker
Compare two text blocks with a simple line diff summary.
Word Counter
Count words, characters, lines, and paragraphs instantly.
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