Screenshot annotations
made simple
Paste a screenshot, mark it up with arrows, text, highlights, blurs, and more — then copy it right back to your clipboard. Fast, focused, and familiar.
How it works
Three steps from screenshot to shared annotation.
Paste your screenshot
Hit Ctrl+V to paste from clipboard, drag & drop an image, or open a file. Your canvas is ready in an instant.
Works with any image — browser screenshots, app captures, design mockups, and more.
Mark it up
Use arrows, text, rectangles, highlights, circles, pin markers, and freehand drawing to communicate exactly what you mean. Blur or redact sensitive info with one click.
Full undo/redo history — never worry about making mistakes.
Export & share
Hit Export & Copy to copy the annotated image directly to your clipboard — ready to paste into Slack, Jira, email, or anywhere else.
Your work is also auto-saved in your daily history so you can revisit any session.
Pixelation that can't
be reversed
Most pixelation tools simply downscale the image — which AI "depixelation" services can partially reconstruct. ScreenMark is different.
Our redaction averages the original pixel data per block and then injects deterministic noise into every channel. The underlying values are mathematically destroyed — no reversal tool, AI model, or forensic technique can recover what was underneath.
Per-block source sampling
Each mosaic block reads directly from the original image pixels — not a rendered canvas copy.
Noise injection per channel
±25 of deterministic noise is added to R, G, and B independently — destroying the signal AI models need to reconstruct.
AI reversal tools blocked
Tools like "depixelate" or "unblur" services rely on statistical patterns. Our noise makes those patterns irrecoverable.
Annotation Tools
Everything you need to communicate visually — all in your browser.
Paste & Go
Paste any screenshot from your clipboard and start annotating instantly.
Arrows & Lines
Draw arrows and lines to point out key areas in your screenshots.
Text Annotations
Add text with custom fonts, bold, italic, and resizable labels.
Rectangles
Draw outlined or filled rectangles to highlight regions.
Circles
Outline or filled circles for rounded highlights.
Highlighter
Semi-transparent highlights to draw attention without covering content.
Freehand Drawing
Sketch freely for quick annotations and hand-drawn marks.
Crop
Crop your screenshot to focus on exactly what matters.
Pro Features
Advanced tools grouped together for polished, professional screenshots.
Arrow + Text
Attach text labels directly to arrows for clear callouts.
Blur & Redact
Cryptographically secure pixelation and solid-fill — impossible to reverse with AI tools.
TearMark – Jagged Torn Edges
Add realistic torn edges to screenshots for documentation, training materials, bug reports, and partial views.
Pin Marks
Numbered pin markers to create ordered callouts on your image.
Eyedropper
Pick any color from your image and use it for annotations.
Extract Text
Copy the text straight out of a screenshot — all of it or just the lines you pick — or rebuild the whole image as HTML with its colours, fonts, spacing and tables intact.
Customizable Toolbar
Drag & drop to reorder tools for your workflow.
Simple, honest pricing
Less than a coffee. Once a year. No subscription guilt.
Free
$0
forever
- Paste & Go
- Arrows & Lines
- Text Annotations
- Rectangles
- Circles
- Highlighter
- Freehand Drawing
- Crop
- Export & Copy
- Auto-Save History
- Undo / Redo
- Zoom & Pan
- Keyboard Shortcuts
- Persistent Custom Colors
Pro
$9.99
/ year
That's ~$0.83/month. Seriously.
30-day free trial included
- Everything in Free, plus:
- Arrow + Text
- Blur & Redact
- TearMark – Jagged Torn Edges
- Pin Marks
- Eyedropper
- Extract Text
- Customizable Toolbar
"We charge less per year than most apps charge per month. We feel a little embarrassed about it, honestly."
A note from the creator: This app makes essentially no money. The Pro plan exists purely to keep the server running — not to fund a yacht. If you find ScreenMark useful, upgrading is the kindest thing you can do. Every renewal genuinely helps keep the lights on. 🙏
Built for Speed
Powerful features that stay out of your way.
Export & Copy
One click to copy to clipboard or download as PNG.
Auto-Save History
Your work is auto-saved and organized by day.
Undo / Redo
Full history support so you never lose a change.
Zoom & Pan
Zoom in for pixel-perfect annotations on large images.
Keyboard Shortcuts
Fast tool switching with single-key shortcuts.
Persistent Custom Colors
Edit and save your own 10 default colors across sessions and devices.
Quick Tips
Keyboard shortcuts to speed up your workflow.
Ctrl + VVATRBCtrl + ZCtrl + YDeleteReady to annotate?
Start marking up screenshots in seconds.