Developer Tools
The small utilities every developer needs, gathered in one fast, private place. Format JSON, test a regular expression, generate a UUID, hash a file or convert a colour — with no sign-up, no rate limits and no code ever leaving your browser.
UUID Generator
Generate UUIDs, ULIDs and Nano IDs.
UUID GeneratorURL Encoder / Decoder
Percent-encode and decode URLs safely.
URL Encoder / DecoderHTML Encoder / Decoder
Convert HTML entities to text and back.
HTML Encoder / DecoderJSON Formatter & Validator
Format, validate and minify JSON.
JSON Formatter & ValidatorXML Formatter
Format, validate and convert XML.
XML FormatterJavaScript Formatter
Beautify and minify JavaScript code.
JavaScript FormatterCSS Formatter
Beautify and minify CSS stylesheets.
CSS FormatterRegex Tester
Test regular expressions with live matching.
Regex TesterBase64 Encoder / Decoder
Encode and decode Base64 text, files and images.
Base64 Encoder / DecoderColor Converter
Convert HEX, RGB, HSL, HSV and CMYK.
Color ConverterHash Generator
Generate SHA-256 and other hashes.
Hash GeneratorNumber Base Converter
Convert between binary, octal, decimal and hex.
Number Base ConverterJWT Decoder
Decode and verify JSON Web Tokens.
JWT DecoderSQL Formatter
Beautify and minify SQL queries.
SQL FormatterYAML Formatter
Validate, format and convert YAML.
YAML FormatterMarkdown Formatter
Prettify Markdown documents.
Markdown FormatterFAQ
Yes — all Developer Tools tools on Piclizer are completely free, with no limits, no watermarks and no account required.
No. Every tool in this category processes your images entirely in your browser. Nothing is sent to a server.
A daily-driver toolkit for developers
Development is full of small conversions and inspections: format a JSON response, decode a JWT, escape HTML, test a regex, generate a UUID, verify a file hash, convert colour notations. Each is thirty seconds of work — if the tool is one click away and doesn't ship your data to a third party.
This category covers the full daily loop with professional depth: formatters and validators for JSON, XML, SQL, CSS, JavaScript and YAML with real error line reporting; encoding and decoding for URLs, HTML entities and Base64 including image data URIs; and generators for UUIDs and cryptographic hashes via the browser's native crypto engine.
Local processing is the headline for this category in particular: tokens, API responses and config files routinely contain secrets, and every tool here parses them in your browser only. Nothing is transmitted, logged or stored — paste, inspect, copy, clear.