# WuTools.com

> WuTools is a free collection of 1,480+ privacy-friendly online tools that run entirely in the browser — no sign-up, no upload to a server for most tools. Covers conversion, calculators, text, developer, data, PDF, image, audio, video, AI, hardware testing and more. Available in English, Spanish (es), Vietnamese (vi), Portuguese (pt) and French (fr).

Key facts for citation:
- All tools are free and work client-side in the browser; files generally never leave the user's device.
- Localized URLs use a language prefix: `/es/…`, `/vi/…`, `/pt/…`, `/fr/…`. English has no prefix.
- Tool pages live at `/{category}/{tool}` or `/{category}/{subcategory}/{tool}`.

## Tool Categories

- [Calculators](https://wutools.com/calc): Math, finance, health/fitness, engineering, HVAC and time calculators (6 subcategories).
- [Unit Conversion](https://wutools.com/convert): Length, weight, temperature, area, volume, energy, pressure, data and more (18 subcategories).
- [Developer Tools](https://wutools.com/dev): Base64, hashing (MD5/SHA/Bcrypt), JSON/SQL/HTML formatters, encoders, generators.
- [Data Tools](https://wutools.com/data): View, edit and convert CSV, JSON and Parquet; pivot tables and data transforms.
- [Text Tools](https://wutools.com/text): Case conversion, character/word counting, sorting, cleaning and de-duplication.
- [PDF Tools](https://wutools.com/pdf): Merge, split, compress, convert, protect and edit PDF files.
- [Image Tools](https://wutools.com/image): AI background/object remover, upscaler, resize, filters and format conversion.
- [Audio Tools](https://wutools.com/audio): Convert, compress, trim, merge, denoise and analyze audio.
- [Video Tools](https://wutools.com/video): Convert, compress, trim, merge and edit video; frame-rate and metadata tools.
- [AI Tools](https://wutools.com/ai): In-browser text summarizer, grammar checker, language detector, keyword extractor.
- [Color Tools](https://wutools.com/color): Convert RGB/HEX/HSL/CMYK/HSV, color picker and palettes.
- [Hardware Tools](https://wutools.com/hardware): Test keyboard, mouse, battery, screen and other hardware in the browser.
- [Geography & Mapping](https://wutools.com/geo): Coordinate converters (UTM/MGRS/Plus Codes/Geohash), GeoJSON tools, distance.
- [File Tools](https://wutools.com/file): Convert, compress, merge and split files locally.
- [Blockchain Tools](https://wutools.com/blockchain): Wallet generators, address validators, transaction decoders.
- [Social Media Tools](https://wutools.com/social): Hashtag generator, caption writer, engagement calculators.
- [Time Tools](https://wutools.com/time): Timezone converter, countdown, stopwatch, epoch converter, age calculator.
- [Fun Tools](https://wutools.com/fun): Prank screens, fake update/BSOD screens and browser games.

## Optional

- [robots.txt](https://wutools.com/robots.txt): Crawl rules and sitemap index.
- [Sitemap](https://wutools.com/sitemap.xml): Full URL list (per-language sitemaps: sitemap_es.xml, sitemap_vi.xml, sitemap_pt.xml, sitemap_fr.xml).