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Vivaldi
tabExtend
The fastest browser for work ever made

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Fast, private developer tools in your browser. JSON formatter, Regex tester, Cron generator, and 17 more.

Which is more popular?
Based on our record, Sidekick Browser seems to be more popular. It has been mentioned 3 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | meetsidekick.com | codeutil.dev |
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In their own words, as submitted to SaaSHub.


Sidekick is designed for the ultimate online work experience and brings together every web tool you use. Today, anyone who works in a browser fights to stay organized. Tabs are out of control, browser windows are all over the place, and desktop apps may work on their own, but they don’t integrate...
CodeUtil.dev is a collection of 20+ browser-based developer tools. JSON formatter & validator, regex tester, cron expression generator, Base64 encoder/decoder, JWT debugger, URL parser, hash generator, and more. Everything runs client-side — no data leaves your browser. No sign-up needed,...
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Sidekick browser video presentation
No CodeUtil.dev videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Sidekick Browser and CodeUtil.dev.
CodeUtil.dev's answer:
CodeUtil.dev runs entirely in the browser — all processing happens on your device, so your data never touches a server. It bundles 20+ tools (JSON, regex, Base64, JWT, cron, hashing, and more) under one roof with zero sign-up. Just open the page and start working.
Share your experience with using Sidekick Browser and CodeUtil.dev. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


The idea of a productivity based browser is great but since this browser is still new, it has trouble with a lot of things. Sometimes it doesn't open a new tab when i try, sometimes web apps don't open, and overall...
We have no reviews of CodeUtil.dev yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


I've been developing frontend in-memory graph DB / state manager for 1) replication 2) incremental sync 3) fast rendering (without VDOM/react). Used in https://seesu.me & https://meetsidekick.com (where I was 1st engineer). Source: almost 4 years ago
To make snapshot it takes current state of DOM, current state of styles (to capture CSS-in-JS stuff), take resources like font/images from network storage (Chrome Dev Tools protocol) and saves it as HTML on disk. I've been developing... Source: almost 4 years ago
Https://arestov.github.io/linkkraft-notes/trails-tree-plus-offline-for-tool-for-thoughts/linkkraft-fresh-offline-spa.mp4 Across similar software ("too many tabs" solvers, snapshoters) combination of trails tree & snapshots that... - Source: Hacker News / almost 4 years ago
Tracking CodeUtil.dev since Mar 2026.
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