Screenshot Annotator — Draw, Highlight & Blur
Capture or upload a screenshot, then annotate with arrows, text, highlights, and blur sensitive info. Runs in your browser. Free, private, no signup.
Tip: You can also paste an image from clipboard anywhere on this page.
How the Screenshot Annotator Works
Toolkiya's screenshot annotator lets you capture your screen (via the browser's getDisplayMedia API on desktop), upload an image, or paste a screenshot directly from the clipboard. Once loaded, you get a canvas-based editor with six annotation tools — arrow, rectangle, text, highlight, blur (pixelate for sensitive info), and freehand pen — all with customizable color. The blur tool applies a pixelation effect that preserves the overall structure of the redacted area while making text unreadable, which is the standard way privacy-conscious bloggers redact sensitive details before posting screenshots.
The tool works with mouse drag on desktop and finger drag on mobile/tablet (full touch event support). Text annotations support placement anywhere on the image with a confirmation Done button so the mobile keyboard doesn't dismiss the input. You can undo individual annotations, clear all, or start with a new image. Export is a high-resolution PNG that preserves the original screenshot's pixel dimensions.
When to Annotate Screenshots
Creating step-by-step tutorials where you need to highlight specific buttons or form fields. Building bug reports that point out exactly what's wrong on a rendered page. Redacting personal information (names, account numbers, email addresses) before sharing a screenshot publicly. Marking up design mockups during review with arrows and notes. Preparing help-desk documentation with highlighted UI elements. Creating social media content that needs callouts and explanations on top of screenshots.
Developers use it for Stack Overflow answers where you need to point out code issues in a screenshot. Product managers use it for feature specs that overlay intent on existing UI. Recruiters use it to redact candidate info when sharing internal email screenshots.
Why Annotate with Toolkiya
Native screenshot tools on Windows, macOS, and Chrome OS have basic annotation but lack blur/pixelate for redaction and are tied to that OS only. Online alternatives like Lightshot and Awesome Screenshot require signup or browser extension installs. Toolkiya's annotator runs in any modern browser, captures or imports your screenshot, and outputs a clean PNG — no installation, no signup, no tracking.
The tool is the only free browser-based annotator with full touch support, making it usable directly from your phone or tablet without any app install. It also supports the standard clipboard-paste workflow — copy a screenshot with Cmd/Ctrl+V and it appears on the canvas ready to annotate.
Frequently Asked Questions
Is my screenshot uploaded anywhere?▼
No. Everything runs in your browser — the image never leaves your device.
Can I capture my screen directly?▼
Yes. Click 'Capture Screen' to use your browser's native screen capture. You can also paste from clipboard (Ctrl/Cmd+V) or upload a file.
What annotation tools are available?▼
Arrow, rectangle, text, highlight, blur (to hide sensitive info), and freehand pen.
What format is the downloaded image?▼
PNG with original resolution, preserving full quality.
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Built & maintained by Mayank Rai
Solo developer based in Lucknow, India