Free Developer Tools. Right in Your Browser.
Lightweight calculators, generators, and productivity tools for developer running locally in your browser sandbox.
JSON Formatter, Minifier & Syntax Linter
Fast, client side JSON beautifier, minifier, and error linter. Safely formats code with 2 space or 4 space indentation and pinpoints exact syntax error line numbers.
Base64 Text & String Encoder / Decoder
Safely encode and decode UTF8 text and Unicode characters to and from Base64 with instant copy, byte telemetry, and zero server logging.
URL Slug & Query Parameter Parser
Deconstruct any web URL into protocol, host, port, path, and an interactive editable table of query parameters with live re assembly and copy.
UUID & GUID v4 Batch Generator
Generate batches of cryptographically random UUID v4 identifiers client side using browser native crypto.randomUUID() with case and hyphen formatting controls.
Unix Timestamp to Human Date Converter
Convert between Epoch timestamps (seconds or milliseconds) and human readable UTC/Local ISO dates with a live ticking current timestamp counter.
HTML Entity Encoder & Decoder
Convert special characters and reserved symbols into HTML named and numeric entities (e.g. < to <) to prevent XSS vulnerabilities, or decode entities back to plain text.
Regex (Regular Expression) Live Tester
Test, debug, and validate JavaScript regular expressions with real time reactive match highlighting, capture group extraction, and regex syntax error validation.
.htaccess Rewrite Rule & 301 Redirect Generator
Generate copy paste Apache .htaccess 301 redirects, mod_rewrite rules, and Nginx configurations entirely in your browser. 100% free web utility.
CSS Box Shadow & Elevation Generator
Design multi layered CSS box shadows and elevation tiers with interactive horizontal/vertical offset, blur, spread, color, and opacity sliders with instant CSS declaration copy.
JWT (JSON Web Token) Header & Payload Inspector
Safely decode and inspect Base64Url encoded JWT headers and claims payloads client side with syntax highlighting, expiration countdowns, and zero token transmission.
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