Diffchecker
Shares rank 12 of 13 diff tools by recommenders
People recommend it for private, browser-based comparison of text and files, with merge support and real-time diffing. The most common caveat is file-size limits.
People recommend it for private, browser-based comparison of text and files, with merge support and real-time diffing. The most common caveat is file-size limits.
5 people gave an opinion
- recommend it
- 5
- criticize it
- 0
- approval share
- 100%
Recommended in 4 of 13 months
- November 2025: recommended
- December 2025: recommended
- January 2026: recommended
- February 2026: not recommended
- March 2026: not recommended
- April 2026: not recommended
- May 2026: not recommended
- June 2026: not recommended
- July 2026: not recommended
- August 2026: not recommended
- September 2026: recommended
- October 2026: not recommended
- November 2026: not recommended (month in progress)
Why it doesn’t carry the badge
- 5 people recommend itNeeds 10 or more, not met.
- Nobody criticizes itNeeds 2 to 1 or better, met.
- Recommended in 4 of 13 monthsNeeds 4 or more, met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
Why people recommend it
Each mark is one comment
Private, input not persisted
“Client-side diffing is great for privacy, but it might help to call out the file-size limits”
Comment from 8 Jan 2026 in “Show HN: Do you think this is the best diffchecker and would you switch?” “The input will not be persisted so no way the data is accessible other that the user.”
Comment from 25 Nov 2025 in “Show HN: Secure private diffchecker with merge support” Real-time diff mode
“it had a switch "Real-time diff" which did exactly what I wanted”
Comment from 14 Dec 2025 in “The Gorman Paradox: Where Are All the AI-Generated Apps?” Called the best online tool
“the best tool I found online”
Comment from 15 Dec 2025 in “AI agents are starting to eat SaaS”
What people warn about
Each mark is one comment
File-size limits may apply
“Client-side diffing is great for privacy, but it might help to call out the file-size limits”
Comment from 8 Jan 2026 in “Show HN: Do you think this is the best diffchecker and would you switch?”
Other diff tools people recommend
The four most recommended other diff tools, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| difftastic | 23 | 1 | 96% | 10 | — | Approved |
| Weave merge tool | 20 | 11 | 65% | 6 | — | — |
| Mergiraf | 19 | 4 | 83% | 5 | 6 mo3 owners | Approved |
| sem | 19 | 7 | 73% | 5 | — | Approved |
| DiffcheckerThis page | 5 | 0 | 100% | 4 | — | — |
What people said
4 of the 6 comments that mention it, newest first. Each links to the original comment.
“Client-side diffing is great for privacy, but it might help to call out the file-size limits”
“the best tool I found online”
“it had a switch "Real-time diff" which did exactly what I wanted”
“The input will not be persisted so no way the data is accessible other that the user.”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.