Image Annotator – Draw, Highlight & Mark Images Online
Annotate screenshots, photos, diagrams, wireframes, and documents using arrows, shapes, text, blur, highlights, and freehand drawing. Everything is processed 100% securely inside your browser.
Drag & drop image here, or browse files
Supports JPG, PNG, WEBP, HEIC, GIF, BMP, TIFF, SVG. You can also paste directly using Ctrl+V or click camera scan.
Annotate Images in 4 Simple Steps
Easier than desktop software — processed 100% locally in your browser.
Upload Image
Drop photo, browse file, or paste screenshot with Ctrl+V.
Choose Markup Tool
Select arrow, shape, text callout, highlighter, or blur tool.
Draw & Highlight
Click or drag on the canvas to draw and redact sensitive data.
Export & Share
Download high-res PNG/JPG or copy directly to clipboard.
Designed for Professionals & Teams
Quick screenshot annotations for feedback, tutorials, bug reports, and presentations.
UI/UX & Bug Reports
Mark UI defects, draw arrows to layout bugs, and blur customer data on QA screenshots.
Students & Teachers
Highlight textbook diagrams, add step-by-step number badges, and annotate study notes.
Marketers & Creators
Create engaging social media graphics, product callouts, and step-by-step tutorial guides.
Privacy & Censoring
Blur credit cards, passwords, phone numbers, and addresses securely before sharing online.
Related Image Tools
Explore more free client-side image editing utilities — no account required.
Frequently Asked Questions
Answers to common queries about image markup & privacy.
An Image Annotator is an online markup tool that allows you to draw freehand, add text callouts, arrows, geometric shapes, number badges, highlights, and blur or pixelate sensitive information on screenshots and photos.
Yes! You can drop any screenshot or image, or paste directly using Ctrl+V to annotate immediately without installing software or creating an account.
No. All canvas drawing, blur calculations, text rendering, and exports happen 100% locally inside your web browser sandbox.
Yes. Select the Blur or Pixelate tool and drag a box over names, email addresses, credit card numbers, or passwords to permanently obscure them.
Yes. You can download your annotated image in high resolution PNG, JPG, or WEBP format, or copy it directly to your clipboard.
We support JPG, JPEG, PNG, WEBP, GIF, BMP, TIFF, HEIC, and SVG.