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seendiff Review

seendiff is a local diff tool optimized for seeing and reviewing all code, ideal for large volume code and pull requests.

shipped Aug 29, 2026codefree
code
seendiff — product screenshot

Why it matters

1Offers a free tier for all users.
2Optimized for AI coding agents and operates within git repositories.
3Features automatic and explicit marking of seen and reviewed code blocks.
4Designed for speed and handling large files with minimal dependencies.

About seendiff

Business Model
Open Source
Funding
Bootstrapped
Platforms
macOS, Linux, Windows
Target Audience
Developers and teams using git for version control

Leadership

Abhishek IyerCreatorLinkedIn
GitHubOpen Source

Screenshots

overview

What is seendiff?

seendiff is a code diff viewer tool developed by Abhishek Iyer that enables developers and teams to view large code diffs while tracking what has been seen and reviewed. It is optimized for AI coding agents and operates within git repositories, providing features for reviewing changes with ease.

features

Key Features of seendiff

seendiff provides a suite of features designed to enhance the code review process, particularly for large codebases and pull requests. Its core functionality revolves around tracking user progress through code changes.

  • Automatically marks seen code blocks as users scroll through diffs.
  • Explicit marking of reviewed blocks allows users to manually confirm review completion.
  • Minimal dependencies ensure straightforward installation and operation.
  • Built for large files and speed, facilitating efficient review of extensive changes.
  • Supports multiple themes for personalized visual preferences.
  • Operates directly within git repositories, integrating with existing workflows.

use cases

Who Should Use seendiff?

seendiff is primarily targeted at developers and teams engaged in code review, especially those dealing with substantial code volumes and frequent pull requests. Its design caters to scenarios where comprehensive review tracking is critical.

  • Developers reviewing code changes in git repositories to ensure thoroughness.
  • Teams collaborating with AI coding agents for better design decisions and code quality.
  • Individuals needing to stay on top of large volume code changes and pull requests.
  • Anyone requiring a local diff tool optimized for seeing and reviewing all code.

how to use

How to Use seendiff

To begin using seendiff, users typically install the tool and then invoke it within a git repository to view and track changes. The interface guides users through marking code as seen or reviewed.

  • 1Install seendiff on macOS, Linux, or Windows platforms.
  • 2Navigate to a git repository in your terminal.
  • 3Execute the seendiff command to view code diffs.
  • 4Scroll through the diff to automatically mark code blocks as 'seen'.
  • 5Manually mark specific code blocks as 'reviewed' to confirm completion.
  • 6Utilize the progress tracking features to manage large pull requests.

pricing

seendiff Pricing & Plans

seendiff is an open-source tool and is available completely free of charge. There are no paid tiers or subscription plans associated with its use.

  • Free: Full access to all features without cost.

Pros

  • +Provides explicit tracking of seen and reviewed code blocks, enhancing review thoroughness.
  • +Optimized for handling large code diffs and files efficiently.
  • +Open-source and completely free to use, with no hidden costs.
  • +Minimal dependencies simplify installation and integration into existing workflows.
  • +Supports multiple operating systems: macOS, Linux, and Windows.

Cons

  • Lacks advanced code review features such as inline commenting or formal approval workflows found in dedicated code review platforms.
  • No API available for programmatic integration with other tools.
  • Information regarding specific AI model integration or function calling capabilities is unknown.
  • Limited public documentation and community presence compared to more established Git tools.
  • Primarily a local diff tool, not designed for collaborative, web-based code review.

Similar Tools

seendiff vs Competitors

seendiff differentiates itself from other Git-related tools by focusing specifically on tracking review progress within diffs, a feature not natively present in many popular alternatives.

1
git-appraise

It enables distributed code review by storing review comments and approvals directly within the Git repository itself, making reviews part of the commit history.

Unlike seendiff which focuses on tracking what has been seen in a diff, git-appraise provides a more formal, persistent code review workflow with comments and approvals stored in Git. It's a heavier solution for formal reviews rather than just tracking personal progress through a diff.

2
lazygit

A terminal UI for Git that provides an interactive and efficient way to manage Git repositories, including staging, committing, and viewing diffs.

While lazygit excels at interactively viewing diffs and managing changes, it doesn't have a built-in mechanism to explicitly 'track what has been seen and reviewed' in the same way seendiff does. The user would rely on their own mental tracking or external notes.

3
git-delta

Enhances the readability of `git diff` output with syntax highlighting, side-by-side views, and other visual improvements, making large diffs easier to parse.

git-delta significantly improves the visual experience of viewing large diffs, which is a core part of seendiff's function. However, it does not offer any built-in functionality to track what has been seen or reviewed, requiring the user to manage that aspect manually.

4
tig

A text-mode interface for Git that allows users to browse commits, view diffs, and interact with the repository history in a highly efficient terminal environment.

tig provides an excellent way to navigate and view diffs within the terminal, similar to seendiff's CLI aspect. However, it lacks the explicit 'tracking what has been seen and reviewed' feature that seendiff offers, meaning review progress would need to be managed externally.

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