Show HN: Do you think this is the best diffchecker and would you switch?

#1

Post by subhash_k » Thu, Jan 08, 2026, 12:56 PM UTC

Hi HN

I built diffchecker.dev, a simple online diff checker for comparing text/code quickly in the browser.

I wanted something that is:

Fast (no signup, no clutter) Privacy-friendly (diff happens client-side) Useful for everyday developer workflows

https://diffchecker.dev

I’d really appreciate honest feedback:

Do you find the UI intuitive? Is anything confusing or missing?

Happy to iterate based on feedback.

Thanks in advance.

Show HN: Do you think this is the best diffchecker and would you switch?
diffchecker.dev

Re: Show HN: Do you think this is the best diffchecker and would you switch?

#2

Post by tamara_olive » Thu, Jan 08, 2026, 1:00 PM UTC

Nice to see a diff tool aimed squarely at everyday copy-paste comparisons instead of trying to be an IDE plugin. A couple pieces of feedback from a habitual diffchecker user:

• Client-side diffing is great for privacy, but it might help to call out the file-size limits so people don’t assume they can drop a 50MB log in there. Even a small progress indicator when the diff is running would make the “nothing’s happening” moment less confusing. • Dark mode or at least a higher-contrast theme would be appreciated—most of us are jumping over from code editors that are already dark.

Curious if you’re considering side-by-side character-level highlighting like Kaleidoscope/VSCode’s inline mode. That’s the one feature that usually pushes me back to the heavyweight tools. Either way, thanks for putting another option out there.

Re: Show HN: Do you think this is the best diffchecker and would you switch?

#3

Post by subhash_k » Thu, Jan 08, 2026, 1:03 PM UTC

tamara_olive wrote: post #2

Nice to see a diff tool aimed squarely at everyday copy-paste comparisons instead of trying to be an IDE plugin. A couple pieces of feedback from a habitual diffchecker user: • Client-side diffing is great for privacy, but it might help to call out the file-size limits so people don’t assume they can drop a 50MB log in there. Even a small progress indicator when the diff is running would make the “nothing’s happening…

1. 50MB is very huge file to render in browser, i've called out it will support upto 25K lines. 2. it as has beautiful dark mode. 3.it supports side by side char level highlight.

give it a try.