Blur sensitive regions
Blur parts of a screenshot before it leaves your machine, which is useful for hiding API keys, tokens, and personal data.
Snapmark
Snapmark is a VS Code extension that lets you annotate clipboard screenshots before pasting them into AI chats. It supports blur redaction, numbered callouts, and automatic resizing for large images.
What Snapmark does
Snapmark is a VS Code extension for annotating screenshots before pasting them into AI chats. It sits in your clipboard workflow so you can copy a screenshot, mark it up, and paste the edited image into tools such as Claude, Copilot, and Cursor.
The product focuses on three specific tasks: hiding sensitive details, adding numbered callouts to explain a flow, and automatically shrinking large screenshots to a 1920 px long edge. The site says it works with any chat that accepts pasted images, and that it is free, open source, and does not collect telemetry.
Core features
Numbered step callouts
Add 1, 2, 3 markers to explain a UI sequence or direct attention to specific elements in order.
Auto-compress on copy
Automatically resizes retina-sized screenshots to 1920 px on the long edge when you copy them, helping keep pasted images smaller for vision models.
Clipboard-aware editor workflow
Detects a clipboard image and opens the annotator from the VS Code status bar, keeping the flow inside the editor.
Paste-ready output
Exports an annotated image that you can paste into Claude Code, Copilot Chat, Cursor, and other image-capable AI chats.
Common use cases
Redacting sensitive screenshots
Hide API keys, tokens, or personal information in a screenshot before sharing it with an AI assistant.
Explaining interface flows
Label the steps in a UI capture so the model can follow the sequence without guessing which element comes first.
Keeping annotation in the developer workflow
Paste a screenshot directly into Claude, Copilot, Cursor, or similar tools without leaving VS Code to open a separate editor.
Reducing oversized images for chat
Shrink large retina screenshots before sending them to a vision-capable chat, especially when the original image has more pixels than the model needs.
Working across image-paste destinations
Use the same clipboard-based process with any app that accepts pasted images, not just the named AI products on the homepage.
Pros and Cons
Pros
- Keeps screenshot annotation in the clipboard-to-chat flow inside VS Code.
- Supports redaction of sensitive regions before pasting.
- Adds simple numbered callouts for step-by-step explanations.
- Automatically reduces large screenshots to a smaller long edge on copy.
- States that it is free, open source, and has no telemetry.
Cons
- The pricing page does not provide any pricing details or plan structure.
- The site does not describe broader image-editing features beyond blur, numbered callouts, and resize on copy.
FAQ
What is Snapmark used for?
Snapmark is a VS Code extension that annotates screenshots from your clipboard before you paste them into AI chats. It is designed for image-based prompts in tools such as Claude, Copilot, Cursor, and other apps that accept pasted images.
Which AI tools does Snapmark support?
The page shows Snapmark working with Claude, GitHub Copilot, Cursor, OpenAI Codex, Gemini Code Assist, and Cline, and says it works with anything else that accepts pasted images.
Can I redact or annotate screenshots before pasting?
Yes. The page describes blur tools for hiding sensitive regions and says you can add numbered callouts to guide the model through a UI flow.
Is there a paid plan or pricing information?
The site says Snapmark is free, open source, and has no telemetry. The pricing page does not provide any additional pricing details.
How does the workflow work?
The workflow shown is: take a screenshot, let Snapmark detect it in the clipboard, open the annotator from VS Code, edit the image, then copy and paste it into your chat.
Quick Facts
- Category
- VS Code extension
- Primary workflow
- Annotate clipboard screenshots before pasting into AI chats
- Supported chat targets
- Claude, GitHub Copilot, Cursor, OpenAI Codex, Gemini Code Assist, Cline, and other image-paste destinations
- Source domain
- snapmarkapp.netlify.app
- License/status
- Free, open source, no telemetry
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