Visual feedback. No install, no signup.
Capture a screen, talk or type through it, ship clean output, to a developer, an agency, or an AI coding agent. Runs in your browser. Free.
How it works
The workflow is the product. Capture, narrate, hand off. Same loop whether the next reader is a developer, a client, a teammate, or an AI coding agent like Cursor or Claude Code.
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1
Capture the screen
Click Capture screen, pick the window you want to review, drag a box around what matters. The screenshot is cropped and stamped with the source URL automatically. No annotation hell, no separate "save as" step.
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2
Add a comment
Type your note, or hit Dictate to talk it through. Either way you get an editable paragraph next to each screenshot. Dictating tends to capture the context you'd skip when typing: what you noticed, a question, an idea, or what you'd change.
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3
Publish and hand off
Hit Publish. You get a public review URL plus a markdown export. Paste the URL into your agent's prompt, or
curlthe markdown into your repo asfeedback.md.
One artifact, every receiver
Each published review is a public URL plus clean markdown, PDF, and Word exports. Polished docs for humans. Plain markdown for AI coding agents. Same review, every destination.
# Staging review, checkout flow
_Published Mar 14, 2026 via Cobalt Capture._
**Reviewing:** <https://staging.example.com/checkout>
**Source:** <https://staging.example.com/checkout>
The submit button overflows the container at viewport widths under
380px on iOS Safari. Should respect the existing max-width 100% rule
from .btn-primary.
---
**Source:** <https://staging.example.com/checkout>
Email validation fires on every keystroke. Should debounce or wait
for blur. The shake animation is also too aggressive for a
soft-validate.Built for the agent in your stack
Each page below is a dedicated playbook: the right prompt pattern, the exact paste destination, what the agent reads inline.
Same workflow, different jobs
The output works whether the reader is a developer, a designer, a client, or an AI agent.
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Product review
PMs walking a build before launch, with feedback the dev (or their agent) can act on.
Read playbook -
QA bug reports
One artifact per bug. Cropped screenshot, source URL, dictated repro. No Slack-to-Linear ping-pong.
Read playbook -
Design review
Designers reviewing what dev shipped, on the built UI, with markdown the dev's agent can ingest.
Read playbook -
Client feedback
Send clients a public URL they can open without an account. Comment trail stays in your inbox, not a tool they wouldn't log into.
Read playbook -
Pull request review
Visual context for UI-touching PRs. The diff shows what changed in code, the review URL shows how it looks on every viewport.
Read playbook -
Competitive analysis
Walk a competitor's product once, narrate the patterns worth borrowing, hand the deck of screens to your team or your PRD.
Read playbook
Honest comparisons with the tools you have
Most feedback tools require a Chrome extension, a signup, or per-seat pricing before you can send one piece of feedback. Cobalt Capture runs in your browser, free.
Common questions
What is Cobalt Capture?
Cobalt Capture is a browser-based visual feedback tool. Capture a screen, talk or type through it, share a clean review, as a public URL, a markdown export, a PDF, or a Word doc. No install, no signup, free. The same artifact works for a developer, a stakeholder, or an AI coding agent like Cursor or Claude Code.
Which AI coding agents does Cobalt Capture work with?
Cursor, Claude Code, Windsurf, Lovable, Bolt, v0, Replit Agent, Cline, Aider, and Zed AI all read pasted markdown or .md files. Cobalt Capture produces both. Any agent that follows URLs or reads files in a repo will work. See all agent workflows for the per-tool playbook.
How is Cobalt Capture different from Loom?
Loom records a video. AI coding agents cannot watch videos. Cobalt Capture produces a markdown document with embedded screenshots, which every modern coding agent can ingest as input. Loom is still good for async demos to human audiences. See why Loom doesn't work with agents.
Do I need an account?
No. You can capture, narrate, and publish a review anonymously. Anonymous reviews are deleted after 30 days. Sign in with Google to keep reviews permanently and unlock editing.
Is Cobalt Capture free?
Yes. The capture and share workflow is free. Unlimited reviews, screenshots, voice dictation, and markdown export. No credit card required. See the pricing page.
What does a Cobalt Capture markdown export look like?
A markdown file with the review title as the H1, an italic published-date line, an optional summary, and a section per finding with an embedded screenshot URL, the source page URL, and your dictated commentary as a paragraph. See markdown screenshots, explained.
Do I have to dictate, or can I type the commentary?
Both work. Every captured item has an editable text field you can type into directly. Dictation is the differentiator because voice tends to capture nuance you'd skip when typing, but it's optional. You can also dictate first and edit the transcript afterward.
Capture, talk, send.
No install. No signup. Free. About a minute from open tab to shareable URL, readable by humans, ingestible by AI coding agents.
Welcome to Cobalt Capture.
You're signed in, nothing here yet. Reviews you create will show up on this page with view counts and quick links to share. Start with your first one:
- Pop out. Cobalt Capture floats on top of whatever you're reviewing.
- Capture. One click per screenshot. Type or dictate commentary inline.
- Finish. Get a shareable URL plus markdown your agent can paste straight into a prompt.
Dashboard
Your recent reviews and how often they've been opened.
Recent reviews
All my reviewsSummary
Shown at the top of the public page. Markdown formatting is supported.
No captures yet. Click Pop out & capture above to start a floating capture session.
Already have a screenshot? Paste it with ⌘V / Ctrl+V, drop the file anywhere here, or use Add image.