LocalDiff
Secure offline text & code diff checker
LocalDiff launched on December 11, 2025.
What it does
Most diff checkers require uploading your code to their servers. LocalDiff runs 100% in your browser using JavaScript. Compare config files, code snippets, and text securely without data leaving your device. Features dark mode and auto-save.
Free privacy-first diff checker tool. Compare text and code securely in your browser. No data sent to servers. 100% Client-side & Offline capable.
Does a similar job
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LocalDiff for WindowsJun 2026 · zabix.lemonsqueezy.com · ▲4Compare files & folders offline — fast, private, beautiful
Secure private diffchecker with merge supportNov 2025 · diffchecker.dev · ▲17This brand new secure diffchecker. It's supports text/code diff upto 25k lines with character level diff all in browser. Supports one of the best inhouse diff merge feature. https://diffchecker.dev/ Now, add list diff - to compare two lists and show unique, common and diff between two lists. https://diffchecker.dev/list/ Add json diff, supports semantic json difference. https://diffchecker.dev/json/ With consistent, clean, minimal UI elements. Would you switch from other websites. Please checkout and provide feedback.
Codiff, a local diff review toolMay 2026 · github.com · ▲31Nowadays I review a lot of code locally that was written by llms. I used to review my own code using git + delta. It started to feel limiting with the amount of code written by llms. When looking at a large diff on Friday I pointed an llm at diffs.com and trees.software and told it to build an app. It only took 16 minutes, is extremely fast for large diffs, beautiful and minimal. Today I polished it up and added all the features that I need. It has file filters, search, an llm walkthrough mode, and review comments that you can paste back into your llm. I will be using Codiff a lot, and can…
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