Language aware diff on GitHub PRs
Hi HN! We were frustrated with text diffs on GitHub PRs, so we made DiffLens (https://github.com/marketplace/difflens). DiffLens constructs an Abstract Syntax Tree for each file, and uses that semantic information to intelligently diff changes. Checkout the demo on our website (https://www.difflens.com). Getting started with DiffLens is easy! Simply install the app on your repositories. The next time you open a PR, DiffLens will automatically create a diff for your changes. If you review code, especially TypeScript, JavaScript or CSS, give DiffLens a try! We're…
Language aware diff on GitHub PRs launched on February 28, 2022 with 8 votes, #1,184 of 2,645 launches that month and more than 50% of that year's launches. The site was still online in September 2026, 4 years on.
What it does
Create language aware diffs on your PRs. Review changes intuitively, identify refactors & align relevant code changes easily
DiffLens is the diff tool for developers! DiffLens is the only diff tool for GitHub that is language aware. DiffLens is FREE for a limited time! DiffLens' semantic features: DiffLens was born out of frustrations with text diffs in pull requests. If you share these frustrations, you will love DiffLens. DiffLens builds an Abstract Syntax Tree (AST) for each file in your pull request and uses that semantic information to intelligently diff and show your changes! DiffLens is then able to leverage the ASTs to identify relevant code changes, align them in the UI and diff only those regions. You will never encounter those long empty regions or perform excessive scrolling again as GitHub tries to…from github.com
In the maker’s words, at launch
Hi HN! We were frustrated with text diffs on GitHub PRs, so we made DiffLens (https://github.com/marketplace/difflens). DiffLens constructs an Abstract Syntax Tree for each file, and uses that semantic information to intelligently diff changes. Checkout the demo on our website…
Does a similar job
all alternatives →
A syntax highlighter for Git and diff output, written in Rust2020 · github.com · ▲261A syntax-highlighting pager for git, diff, grep, rg --json, and blame output - dandavison/delta
Diffle, a keyboard-centric diff viewer with LSP support13d ago · github.com · ▲74A keyboard-first diff viewer with LSP support and GitHub integration. - moritzwilksch/diffle
Syntax Highlight for your github diffs2012 · github.com · ▲18
GitHub style split diffs in your terminal2021 · github.com · ▲178Syntax highlighted side-by-side diffs in your terminal - banga/git-split-diffs
- ASA stab at building my own string diffing library2022 · ▲29
Took a stab at building my own string diffing JS package. I built an interactive demo for TypeIt’s website (https://typeitjs.com/build-your-own) a while back. The approach I took to handle user input necessitated a way to calculate the difference between the versions of a user’s text input. I searched around for a package to help me out and found a couple of good ones (like fast-diff), but I either didn’t really like their API or didn’t want to take on a huge new dependency. Instead, I thought I’d give it a shot myself (famous last words). I dove into it having no real formal…
Deff – Side-by-side Git diff review in your terminalFeb 2026 · github.com · ▲120deff is an interactive Rust TUI for reviewing git diffs side-by-side with syntax highlighting and added/deleted line tinting. It supports keyboard/mouse navigation, vim-style motions, in-diff search (/, n, N), per-file reviewed toggles, and both upstream-based and explicit --base/--head comparisons. It can also include uncommitted + untracked files (--include-uncommitted) so you can review your working tree before committing. Would love to get some feedback
More dev tools this month
the category →
open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.
Dev tools · 27d ago · github.com
Contribute to reladraw/reladraw development by creating an account on GitHub.
Dev tools · 25d ago · github.com
OpenBot▲362Grok Bot alternative: free, local, open-source, multiplayer
Dev tools · 22d ago · openbot.run
Talanoa▲341Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…
Dev tools · 20d ago · talanoa.email
CoreSpeed▲332One MCP for everything your agents need: apps, memory, tools
Dev tools · 28d ago · corespeed.io
Source: Show HN post ↗ · launch text quoted in part
Launched alongside, February 2022
the whole month →
Sha256 algorithm explained online step by step visually
Life & fun · 2022 · sha256algorithm.com
EdgeDB 1.0▲947Today, after years of research, development, and refinement EdgeDB graduates to a production-ready database. We are very proud to announce EdgeDB 1.0.
Dev tools · 2022 · edgedb.com
