About yutils
yutils is a free, search-first collection of developer and everyday utilities you can use instantly in your browser.
yutils brings together the tools you reach for most — JSON formatter, Base64 encoder, JWT decoder, and more — on a single static / SSR site. No install, no signup; land on a tool from a search result and start using it immediately.
Operating principles
Data is processed in your browser
Whenever possible, conversions and computations run in client-side JavaScript, and your input is not sent to any server. This is the default for privacy, speed, and operating cost. Tools that genuinely need an external API show a clear badge at the top of the page.
Designed around search-first entry
Most users arrive by typing something like 'json formatter' into Google and landing directly on a tool page. Every tool gets its own URL, meta tags, OG image, and JSON-LD structured data, and the actual tool UI is visible above the fold — no long preamble.
White background by default + 12 light theme presets
A plain white background is the default to keep long sessions easy on the eyes, paired with 12 curated light theme presets and a dark mode. Your selection lives in browser localStorage and is never sent to a server.
Free, minimal ads, no sign-in
yutils is free to use without any sign-up or login. To cover hosting costs, ads may appear on some pages — but only in positions that don't crowd out the tool UI above the fold.
Tech stack
Next.js App Router · React · Tailwind CSS · next-intl · Cloudflare Workers (@opennextjs/cloudflare). Heavy libraries are loaded lazily per tool so they never bleed into other tool pages.
Open source
yutils is open source on GitHub. Bug reports, feature ideas, and translation contributions are all welcome. github.com/pplenty/yutils
Contact
Reach out via GitHub Issues or by email to the maintainer.