Snapmark review
A free VS Code extension for annotating screenshots and copying them into AI chats.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Snapmark is a free, open-source Visual Studio Code extension for developers who want to mark up screenshots before sharing them in AI chats. It can take an image from the clipboard or accept an image file, then offers drawing, text, highlighting, cropping, numbered steps and redaction. The central workflow is to copy the edited image and paste it into a chat or another destination that accepts pasted images. Its intended audience is solo developers and small teams, particularly those who communicate coding questions with annotated visuals.
The integration fit centers on coding assistants: Snapmark lists Claude Code, GitHub Copilot, Cursor, OpenAI Codex, Gemini Code Assist and Cline. Those integrations place the extension near developers’ existing AI-chat workflows; the product’s key job remains preparing and copying an image, rather than adding AI features of its own. This focused scope may suit someone who needs a quick way to point out a region or sequence of steps. Buyers seeking measurement tools, collaboration features or a wider screenshot capture and editing workflow may need a different tool.
According to its product and extension pages, Snapmark runs locally, with no accounts, network calls or telemetry. Its free and open-source model means there are no paid tiers to compare in the published positioning. The specified output is clipboard copying, so the workflow depends on a destination that accepts pasted images rather than a stated set of file export formats. Choose Snapmark if clipboard-based annotation in VS Code matches how you ask coding assistants for help; look elsewhere if you need team review, measurement, or a more extensive capture and export system.
Snapmark pros and cons
- Where it wins
- Copies annotated images to the clipboard for pasting into AI chats
- Includes drawing, text, highlighting, crop, numbered-step and redaction tools
- Free, open source, and runs locally without accounts or telemetry
- Where it doesn't
- Focused on preparing images for pasting, not broader screenshot workflows
- No measurement tools or team collaboration
- Specific file export formats are not stated
Snapmark fact sheet, pricing and score →
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