A sharper toolbox for developers

Fast, free, privacy-friendly developer tools — formatters, converters, generators, and a handful of genuinely useful AI helpers. Most run entirely in your browser.

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Developer

Everyday utilities for working with data formats and tokens.

JSON Formatter

Pretty-print, minify and validate JSON, with the exact line and column of any syntax error.

Encoder / Decoder

Encode and decode Base64, URL components and HTML entities — UTF-8 safe, both directions.

UUID & Hash Generator

Generate UUID v4s in bulk, and hash any text with MD5, SHA-1 or SHA-256.

Cron Expression Explainer

Turn a cron expression into plain English and see the next five times it will actually run.

Regex Tester

Test regular expressions with live match highlighting, flag toggles and a capture-group breakdown.

JWT Decoder

Decode a JSON Web Token's header and payload, with readable claims and an expiry check.

Text

Compare, count, convert, and preview written content.

Text Diff Checker

Compare two blocks of text line by line and see exactly what was added, removed or left alone.

Word Counter & Readability

Count words, characters, sentences and reading time, with Flesch readability scoring.

Case Converter

Convert text between camelCase, snake_case, kebab-case, Title Case and five more, all at once.

Markdown Previewer

Write GitHub-flavoured markdown and see it rendered live in a split pane.

Lorem Ipsum Generator

Generate placeholder text by paragraph, sentence or word count, optionally wrapped in HTML.

Design

Colour, CSS, images, and other visual helpers.

Favicon & Open Graph Previewer

See how a page's link preview and favicon look across X, Facebook, LinkedIn and Slack.

Colour Palette & Contrast

Build colour harmonies from a base colour and check any pair against WCAG contrast rules.

Gradient & Shadow Builder

Design CSS gradients and multi-layer box shadows visually, then copy the exact declaration.

QR Code Generator & Reader

Generate QR codes as PNG or SVG, and decode them from an uploaded image or your camera.

Image Compressor

Resize and re-encode images to WebP, JPEG or PNG in your browser, with before and after sizes.

AI

Gemini-powered tools for the tedious parts of shipping code.

AI README Generator

Turn a project description or a package.json into a complete, downloadable README.md.

AI Commit Message Writer

Paste a git diff and get a Conventional Commits message that describes what actually changed.

AI Code Explainer

Paste code and get a plain-English explanation plus a flowchart of how it actually branches.

AI Resume Bullet Rewriter

Turn a weak CV bullet into three stronger, quantified versions with different emphases.

AI Screenshot to Code

Upload a screenshot of any interface and get working HTML and Tailwind CSS back.