Developer tools: format, encode, test, and ship faster
Free developer utilities: JSON formatter, Base64, hashes, regex tester, color conversion, screen resolution, Markdown editor, image compression, and more—client-side where possible.
If you build for the web, you spend half your life in small utilities: validate this payload, test this regex, grab a hash, tweak a color, shrink an asset. The best tools stay out of the way—fast keyboard paths, no account wall, and clear output you can copy in one click.
Our developer section is intentionally practical. You will not find a bloated IDE here; you will find sharp single-purpose helpers that pair well with your actual editor and deployment flow.
Why we grouped these tools together
Developers rarely need one tool in isolation. JSON formatting leads to Base64 for tokens, regex for log parsing, Markdown for READMEs. Clustering these tools signals topical relevance to search engines and saves you from opening ten random tabs with different ad loads.
Who these are for
- Frontend and backend engineers debugging payloads and configs
- Students learning web technologies who need a safe sandbox
- Content engineers who live half in Markdown and half in JSON
Pick a tool, keep the tab pinned, and tell us if you want a utility we have not shipped yet—we add based on real demand.
All 11 tools in this cluster
JSON Formatter & Validator
Format, minify, and validate JSON in your browser—pretty-print with indentation or compress to a single line.
Open JSONBase64 Encoder & Decoder
Encode UTF-8 text to Base64 or decode Base64 back to text in your browser—handles Unicode and ignores whitespace when decoding.
Open Base64Password Generator
Generate strong, random passwords with configurable length, character types, and strength indicator. Uses Web Crypto API.
Open PasswordHash Generator (MD5/SHA)
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes instantly in the browser. No data leaves your device.
Open Hash GeneratorColor Converter & Picker
Convert colours between HEX, RGB, and HSL. WCAG contrast checker, color palettes, and CSS output included.
Open Color ConverterRegex Tester
Test regular expressions with live matching, highlighting, capture groups, find & replace, and a quick reference cheat sheet.
Open RegexScreen Resolution & Aspect Ratio Calculator
Calculate screen resolution, aspect ratio, PPI, and resize dimensions. Presets for phones, monitors, social media, and print.
Open ResolutionImage Compressor
Compress and resize images in your browser. Supports JPEG, PNG, and WebP with adjustable quality.
Open Image CompressMarkdown Editor
Write and preview Markdown in real time. Toolbar for formatting, copy as HTML, and live word count.
Open MarkdownAI Writing Style Checker
Lightweight heuristics on sentence length, word variety, and a few overused patterns—editing help, not a courtroom AI detector.
Open Style CheckImage Prompt Builder
Assemble clear prompts for image models from subject, style, lighting, mood, and aspect ratio—no upload required.
Open Prompt BuilderLooking for something else? Browse the full sitemap or use the search bar in the header.