# SnapDiff

> Free screenshot comparison, pixel Diff, annotations, accessibility checks, and full-quality exports. No account required.

Canonical page: [https://chrome-stats.com/d/snapdiff](https://chrome-stats.com/d/snapdiff)

## Overview

- **ID:** `snapdiff`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Snapdiff.co
- **Category:** web-development
- **Daily users:** 1
- **Version:** 0.1.6
- **Last updated:** 2026-10-10
- **First published:** 2026-09-17
- **Size:** 866 KB
- **Data as of:** 2026-11-05
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/snapdiff/)
- **Website:** [https://snapdiff.co/contact](https://snapdiff.co/contact)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/snapdiff/privacy/](https://addons.mozilla.org/firefox/addon/snapdiff/privacy/)

## Description

SnapDiff makes visual reviews easier: capture a webpage, compare before and after, mark the changes that matter, and export clear evidence for your team.

Every feature is free for personal and professional use. No account, subscription, paid tier, or activation key. Workflows are unlimited, subject to capture and export safety limits.

CAPTURE WHAT MATTERS
Capture the visible page, a selected area or element, or a full page. Start from the extension toolbar and keep your work in a local library.

SEE WHAT CHANGED
Compare two screenshots side by side and use pixel Diff to highlight changes. Import reference images for A/B reviews, or compare several captures visually in a Multi group.

MARK THE ISSUE
Add arrows, shapes, text, freehand marks, and rulers. Annotate individual images or across a comparison. Edits save automatically.

SHARE CLEAR EVIDENCE
Copy an annotated PNG or download full-quality PNG, JPEG, WebP, and image-based A4 PDF files. Clean exports are included. Add an optional name watermark or timestamp when it helps your workflow.

CHECK MORE THAN PIXELS
Run optional local axe accessibility checks alongside your capture. Review saved findings and export a JSON report. Automated checks assist a review; they do not certify accessibility.

KEEP YOUR SCREENSHOTS LOCAL
Screenshots, annotations, and accessibility reports stay in your browser. Structured usage and diagnostic reporting uses a random installation ID and never includes those contents or captured page URLs or titles. See the privacy policy for details.

Built for designers, developers, QA reviewers, and anyone who needs to explain a visual change clearly.

Learn more: <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/0a126823145998a70751078d3ea8a4e1ddfbf67396de4c7aff29ba19d5a82ea1/https%3A//snapdiff.co" rel="nofollow">https://snapdiff.co</a>
Documentation: <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/b941170057d4a3a338724a8aed2524eaaeb755bdaf8d9e6440a5c2c46940e7dd/https%3A//docs.snapdiff.co" rel="nofollow">https://docs.snapdiff.co</a>
Privacy policy: <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/c03dbae248739520fb1dc0df042112654b50e98e99595c98879adac488ed9b51/https%3A//snapdiff.co/privacy" rel="nofollow">https://snapdiff.co/privacy</a>

## Rankings

- #119,079 — Overall

## Permissions and access

### Permissions

- `activeTab`
- `scripting`
- `storage`
- `downloads`
- `alarms`

### Host permissions

- `https://us.i.posthog.com/*`

## Safety

- **Risk impact:** Low risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Allows management of download operations but generally doesn't severely affect security unless misused.
- This extension was recently updated in the past month. New updates may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/snapdiff)