About TeaFun

TeaFun is a curated workbench of browser tools for makers, developers, gamers, and everyday workflows. Every utility on the site runs in the browser, loads quickly on any device, and stays out of your way. There are no accounts to create, no tracking pixels, and no waiting for a server round-trip. You open a page, paste or upload what you need, and walk away with the result.

What you will find on TeaFun

TeaFun gathers over thirty tools and arcade games across four pillars. The developer toolkit covers JSON formatting and validation, Base64 and JWT decoding, YAML / JSON / TOML conversion, log parsing, cron expressions, env-file translation, regular-expression playgrounds, and the all-in-one Text Toolkit pipeline. The gaming benchmarks cover reaction time, click speed, aim trainers, typing rate, spacebar speed, memory sequences, monitor and colorblind checks, gamepad input testing with vibration, and mouse acceleration measurement. The calculators handle salary, tip splits, GPA averaging, daily energy expenditure, aspect ratios, floor plans, net worth tracking, cover-letter generation, and ADHD task prioritisation. The arcade lane offers a half-dozen short brain games that respect your time.

Why client-side first

Every TeaFun tool processes your data inside your browser. Text you paste never travels to a server, files you upload never leave your device, and the inputs you type are never logged for analytics. The benefit is immediate: results render the moment you stop typing, the page works offline once it has loaded, and your sensitive data, like API tokens, salaries, or medical numbers, stays on your machine. The trade-off is deliberate. TeaFun cannot offer cloud sync, multi-device history, or real-time collaboration, because doing so would mean shipping your inputs to a backend. We think the privacy gain is worth the missing features.

How we ship updates

TeaFun iterates daily. Bug reports filed on the public feedback tracker usually land the same day. Accessibility passes target WCAG AA contrast, keyboard navigation, ARIA roles, and screen reader output. The interface ships in nine languages: English, Traditional Chinese, Simplified Chinese, Spanish, French, German, Brazilian Portuguese, Japanese, and Korean, all maintained in lockstep with the English source. New tools and games are added based on direct feedback from real users, not feature checklists.

Built for search, not signup

TeaFun is designed for a specific moment: you typed a question into a search engine, you landed on a page, and you want the answer in seconds without making an account. Every page has one clear purpose. There are no popups asking you to register before using the tool, no email walls in front of features, no notifications begging you to come back. The work is the page. When you are done, you leave. If you find a tool useful, bookmarking it is the only commitment we ask for.

Who runs TeaFun

TeaFun is an independent web project run by the TeaFun team. For bug reports, feature requests, or partnership enquiries, open an issue on the public tracker at github.com/TeaBay, or email hello@teafun.cyou.

Policies and contact

To understand how TeaFun handles data, read the Privacy Policy. For bug reports, feedback, or business contact, visit Contact. Site usage terms are available on the Terms page.