# Coders Hub

> Free browser-based developer tools. Every tool runs entirely client-side — no uploads, no login, no API keys.

Coders Hub is a growing catalogue of fast, private utilities for developers: formatters, converters, encoders, generators, calculators and SEO helpers. All processing happens locally in the browser using standard web APIs, so data never leaves the visitor's device.

## Pages

- [Home](/): Search the full tool catalogue and browse popular tools.
- [All tools](/tools): Complete searchable index of every tool with category filters.
- [Collections](/collections): Curated bundles of tools for common workflows.
- [Blog](/blog): Guides and explainers about the tools and the techniques behind them.
- [About](/about): How the client-side execution model works.
- [Privacy](/privacy): What data is stored (nothing leaves your browser).

## Categories

- [JSON](/tools/json): Format, validate, minify, compare and convert JSON.
- [Text & String](/tools/text): Counters, case conversion, slugs, dedupe, diff.
- [HTML & CSS](/tools/html-css): Formatters plus visual gradient, shadow, flexbox and grid generators.
- [Images](/tools/images): Compress, resize, crop, convert and optimise images.
- [SEO](/tools/seo): SERP previews, meta tags, schema.org, robots.txt and sitemaps.
- [Converters](/tools/converters): CSV, YAML, XML, Markdown, units and number bases.
- [Encoders & Crypto](/tools/crypto): Base64, URL, JWT, hashing, HMAC and AES.
- [Generators](/tools/generators): UUIDs, passwords, mock data and boilerplate.
- [Date & Time](/tools/datetime): Timestamps, timezones, durations and cron.
- [Network & IP](/tools/network): Subnets, CIDR, URL parsing and HTTP status codes.
- [Color](/tools/color): Conversion, palettes, shades and WCAG contrast.
- [Math & Numbers](/tools/math): Percentages, statistics, ratios and matrices.
- [Security](/tools/security): Password strength, CSP, security headers and secret scanning.
- [PDF & Documents](/tools/pdf): Metadata, text extraction and printable documents.
- [Dev Utilities](/tools/dev-utils): Regex tester, cron builder, escaping and code snippets.

## Optional

- [Sitemap](/sitemap.xml): Machine-readable index of every public page.