Features
Every tool your team needs to ship pixel-perfect work
Annotate live websites, images, and PDFs. Collaborate in real time. Let AI fix what you find. One platform for the entire feedback-to-fix workflow.
Free forever for individuals. No credit card required.
How it works
From feedback to fix in three steps
Point at a problem, and our AI agent does the rest — no context-switching, no back-and-forth.
Annotate
Click anywhere on a live page, image, or PDF. Leave your feedback right where the issue is.
AI analyzes & fixes
The agent clones your repo, finds the relevant code, and generates a fix in an isolated sandbox.
Review & ship
A draft PR appears on GitHub. Review the diff, approve, merge — done.
Pin feedback on live websites
Navigate to any page and click exactly where you see the issue. Your feedback is attached to the element, not a screenshot — so developers know exactly what you mean.
- Click anywhere to drop annotation pins
- Comments attached to exact DOM elements
- Responsive viewport switching (desktop, tablet, mobile)
- Automatic screenshot capture with each pin
AI reads your feedback and opens a PR
Click "AI Fix" on any annotation. The agent reads your feedback, clones the repo into an isolated sandbox, finds the code, generates a fix, and opens a draft pull request — all automatically.
- Works with any GitHub codebase (React, Vue, Svelte, Angular, HTML/CSS)
- Ephemeral sandboxes — code never stored
- Context-aware: reads the annotation screenshot + comment
- Draft PRs with clear commit messages and diffs
$ Analyzing annotation...
$ Cloned acme/checkout-app
$ Found: BuyButton.tsx:24
$ Fix: contrast ratio→ 4.5:1
PR #247 created — fix: increase buy button contrast
Annotate designs, screenshots, and documents
Upload design exports, screenshots, or PDFs. Pin comments on specific areas and discuss changes with your team — no more "see the red circle in the screenshot" messages.
- Drag-and-drop file upload
- Supports PNG, JPG, WebP, SVG, and multi-page PDFs
- Threaded comments per annotation
- Version comparison (before/after)
Leave timestamped feedback on video
Upload a screen recording or walkthrough video. Scrub to any moment and drop a comment tied to that exact timestamp. Reviewers jump straight to the relevant frame.
- Timestamped comments on video timeline
- Supports MP4 and WebM
- Click any marker to jump to that moment
- Frame-accurate feedback for animations
Collaborate with live cursors and presence
See who's viewing the same markup in real time. Watch teammates' cursors, see typing indicators, and resolve feedback threads together — no more "are you looking at the same thing?" moments.
- Live cursor tracking for all viewers
- Real-time presence indicators
- Typing indicators in comment threads
- Instant comment sync across devices
Auto-create issues in Slack, Linear, and GitHub
When feedback is submitted, Sitemarks auto-creates issues with full context — screenshots, DOM metadata, and threaded comments. No copy-pasting between tools.
- Slack: rich notifications with preview images
- Linear: auto-create issues with DOM context
- GitHub: issues and PRs with metadata
Share with anyone — no login required
Generate a share link for any markup. Clients and stakeholders can view the page and leave annotations without creating an account. You control the permissions.
- Shareable review links with one click
- Configurable: view-only or comment-enabled
- Optional password protection
- Guest comments attributed by name or email
Integrates with your workflow
Teams use Sitemarks to cut review cycles from days to hours.
See it in action
Start collecting visual feedback in minutes. Free forever for individuals, no credit card required.