Client-side ads-free dev utils (diffs, time conversion, JSON formatter)
utils.foo a fully client side, ads-free developer utils app. Today, it has a timestamp converter, base64/url encoder/decoder, json & diff utils, quick pivoting data. A lot of these exist, but often buried with ads or unclear data usage. I wanted to build something for myself that is ads-free and easy to use. My goal is get to top 20 commonly used tools, make them feature-rich and then reduce the page size. Will appreciate feature/tools requests and feedback at https://github.com/midplane/forum.utils.foo/issues.
Client-side ads-free dev utils (diffs, time conversion, JSON formatter) launched on September 2, 2024 with 10 votes, #1,270 of 5,281 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 2 years on.
In plain words
utils.foo is a client-side, ad-free collection of developer utilities including a timestamp converter, base64 and URL encoder/decoder, JSON formatter, and diff tool. It runs entirely in the browser with no data tracking. The app is designed for developers seeking straightforward access to common tools without advertisements or unclear privacy practices. The creator plans to expand to twenty essential tools while keeping the application lightweight.
written from the facts on this page · September 2026
From the sources
Developer utilities that run 100% client-side. Your data never leaves your browser.
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