Multi-format export
JSON with element selectors, PDF summary with visual annotations, Markdown for handoff.
Stop screenshotting. Start reviewing the actual page.
Sidenote lets reviewers click any element on your page and leave feedback that anchors to the DOM — not a static image. When the design changes, the feedback follows.
Reviewers just enter a name — no signup · Free plan included
Email threads. Screenshot markup. Lost context. Sound familiar?
Your client screenshots the page on their phone. The screenshot is 375px wide and they've circled something near the header — but the desktop layout is completely different so you can't tell what they mean. Three emails later, you're still guessing.
Meanwhile, the design has moved on. The screenshot is a fossil.
Screenshots lie
A screenshot captures one viewport at one moment. Resize, scroll, or update the layout and it’s meaningless.
Precision is impossible
“The thing near the top” isn’t a design note. You need feedback anchored to the actual element — heading, image, div — not a red circle on a JPEG.
Reviewers won’t sign up
You need feedback from five stakeholders. Two won’t create accounts. One will email you instead. Now feedback lives in three places.
Upload. Share. Review. That's it.
1
Upload
Drop in your document — HTML, PDF, or images. Sidenote renders it exactly as your audience would see it.
2
Share a link
Send the review link to anyone. Reviewers enter their name and start clicking elements to comment. No signup. No password. No invite email.
3
Collect structured feedback
Every annotation is anchored to a specific element in the page. Export as JSON for your dev team, or let an AI agent read it via MCP and iterate automatically.
New version? Your annotations come with it.
Upload a revised document and Sidenote re-anchors previous comments to matching elements using fuzzy text matching. Visual diffs highlight what changed between versions. Threaded conversations carry forward.
Other tools make you start over every time the design changes. Sidenote carries context forward.
Catch accessibility issues during review, not after launch.
Every document gets an automated WCAG 2.1 AA scan. Contrast ratios, missing alt text, heading hierarchy — flagged inline so you can click a finding and jump straight to the element.
No other design feedback tool includes this. Most teams run accessibility checks in a separate tool, after the review is done, when it's too late to fix anything without another round of feedback.
Your AI made the first draft. Your team tells it what to fix.
More design work starts with AI now — landing pages, reports, email templates. The first draft appears in seconds. The review still takes days because it happens in screenshots and email threads.
Sidenote connects directly to AI tools like Claude, ChatGPT, and other agents that support the Model Context Protocol. Your agent uploads the design, your team reviews it on the actual page, and the agent reads their feedback as structured data — then iterates and resubmits. No copy-pasting. No translating sticky notes into tickets.
The review becomes a conversation between your team and the AI, with Sidenote as the surface where it happens.
More design work starts with AI now — landing pages, reports, email templates. The first draft appears in seconds. The review still takes days because it happens in screenshots and email threads.
Sidenote connects directly to AI tools like Claude, ChatGPT, and other agents that support the Model Context Protocol. Your agent uploads the design, your team reviews it on the actual page, and the agent reads their feedback as structured data — then iterates and resubmits. No copy-pasting. No translating sticky notes into tickets.
The review becomes a conversation between your team and the AI, with Sidenote as the surface where it happens.
All the features. None of the bloat.
Pro
Pro
Pro
Reviewers are always free. Seriously.
You pay for uploaders, not seats. Every reviewer, client, and stakeholder comments free — no per-seat tax on collaboration.
FAQ
Frequently asked questions
A design feedback tool lets teams collect, organise, and act on feedback about designs and web content in one place. Sidenote goes further — reviewers annotate live HTML elements, not screenshots, so feedback stays anchored even when the design changes.
Those tools annotate screenshots or static images. Sidenote reviews the actual HTML document with annotations that anchor to DOM elements. It also includes built-in accessibility auditing, version diffs, structured JSON export, and AI agent integration via MCP — features no other tool in this category offers.
No. Send a link and reviewers enter their name to start. No passwords, no invites — which matters because the more friction you add, the fewer stakeholders actually leave feedback.
HTML documents, images (PNG, JPG, SVG, GIF), and PDFs. HTML is where Sidenote is strongest — annotations anchor to actual DOM elements so they survive layout changes and responsive breakpoints.
Yes. Sidenote supports the Model Context Protocol (MCP), which means AI agents from Claude, ChatGPT, and others can upload designs, read your team's feedback as structured data, and push revisions — no manual copy-pasting between tools.
Yes. 5 documents, 3 versions each, unlimited reviewers. No credit card. Pro and Team plans unlock MCP access, brand auditing, and shared workspaces.
Upload a revised version and existing annotations re-anchor to matching elements automatically. Visual diffs show exactly what changed between iterations. Threaded conversations carry forward — so you can trace how feedback was addressed.
Yes. Every document gets a WCAG 2.1 AA scan inline — contrast ratios, alt text, heading hierarchy. Findings are clickable so you can jump to the exact element. Most design feedback tools don't include this; it usually lives in a separate audit tool.