Annotate Image Online
Annotation tool
Add text, arrows, shapes, and drawings to any image. Supports JPG, PNG, HEIC, RAW, and 15+ formats.
Click to upload or drag and drop
HEIC, WEBP, AVIF, TIFF, BMP, GIF, PNG, JPG, CR2, NEF, ARW, DNG — up to 50 MB
SVG and PDF are not supported for annotation.
is the one being used — this tool works on one image at a time.
Convert several at onceCtrl+Z undo · Ctrl+Y redo
Properties
Keyboard Shortcuts
General
More tools
- Convert HEIC, RAW, AVIF to anything.
- Compress Smaller file, same look.
- Resize Percent, pixels or preset.
- Crop Snaps to faces for you.
- Edit Rotate, filter, enhance.
- Remove BG One click, no green screen.
- Video Clips, frames and GIFs.
- Bulk Up to 50 images at once.
- Inspect Read EXIF and metadata.
- Identify Detect format by magic bytes.
- Compare SSIM and PSNR side by side.
- Metadata Write EXIF, GPS, copyright.
What you can annotate
KoalaPic's annotation tool draws six kinds of mark directly onto an image: text, arrows, rectangles, circles, straight lines and freehand strokes. The marks are burned into the exported file, so they survive being emailed, pasted into a document or uploaded anywhere, unlike a comment layer that only exists inside one application.
The six annotation types
- Text, for labels and callouts, with a colour and size you set.
- Arrows, for pointing at the thing you are talking about.
- Rectangles and circles, for framing a region — filled or outline only.
- Straight lines, for measurements and dividers.
- Freehand strokes, for circling something the way you would with a pen.
Can I annotate a screenshot without installing software?
Yes. The annotation canvas runs in the browser, needs no account and no download, and exports a normal image file. It accepts screenshots in PNG, JPG and WEBP as well as HEIC, TIFF and RAW files straight from a camera.
Are the annotations permanent, or can I edit them later?
They are flattened into the exported image, which is what makes them display everywhere. The original upload is untouched, so if you need a different set of marks you annotate the original again rather than editing the export.
Can I blur or hide sensitive information in an image?
Yes. Draw a filled rectangle over the region you want to cover, which removes the underlying pixels from the exported file rather than merely obscuring them on screen. For a softer effect, the image editor applies a Gaussian blur by radius.
Is there an API for adding annotations automatically?
Yes. POST an image and a list of annotations to /v1/annotate and the response is the annotated file. The endpoint is synchronous, so there is no job to poll.