A practical online screenshot editor
A screenshot editor turns a raw capture into clear visual communication. Use arrows and labels for support tickets, rectangles and highlights for product feedback, or numbered circles to explain a tutorial in sequence. FiloTool keeps the source at its original pixel resolution while scaling only the on-screen workspace.
Annotate with arrows and text
Choose an annotation, drag it into place, then select it to change colour, opacity, line width, text, order, or lock state. Freehand drawing and the semi-transparent highlighter are useful when rigid shapes feel too formal.
Blur, pixelate, or redact
Blur softens a region and pixelation replaces it with blocks. Both are useful for visual emphasis, but neither should be treated as guaranteed privacy. A fully opaque redaction replaces covered pixels during export and is the appropriate option for secrets.
Crop and rotate
Rotate captures in 90-degree steps and apply a centred crop before export. Cropping changes the exported dimensions; zoom never does. The original source stays in memory until you replace it, reset, or leave the page.
Local processing and export
All editing runs with the browser's image, SVG, and Canvas APIs. Export as lossless PNG, quality-controlled JPG, or WebP. Browser codec support and available device memory can affect very large images.
Common uses and limitations
The editor is designed for tutorials, bug reports, documentation, social posts, business communication, and privacy cleanup. It edits one still image at a time, does not retain drafts after the page closes, uses a 40 MB and 40-megapixel safety limit, and does not support animation or advanced vector import.
Frequently asked questions
How do I edit a screenshot online?
Upload, drop, or paste a JPG, PNG, WebP, or BMP image. Add annotations on the canvas, then export a flattened PNG, JPG, or WebP file.
Can I add arrows to a screenshot?
Yes. Choose Arrow, drag from the start to the end point, and adjust its colour, width, opacity, or layer order.
Can I add text and numbers?
Yes. Text labels and automatically numbered markers remain editable until export. Select an item to change its content and style.
How do I blur sensitive information?
Choose Blur and drag over the area. Blur is rendered into the downloaded image, but solid redaction is the safer choice for information that must be fully covered.
Is pixelation safer than blur?
Neither effect guarantees that underlying information is unrecoverable. Use a solid redaction box and export the flattened result for permanent visual covering.
How do I permanently redact information?
Draw a solid Redact area, keep it fully opaque, and export. Export flattening replaces the covered output pixels; an editable overlay alone is not permanent.
Can I crop a screenshot?
Yes. The crop action creates a centred crop that removes ten percent from each edge. Reset it from the same control before export if needed.
Can I paste a screenshot from my clipboard?
Yes. With the editor page focused, use Ctrl+V or Cmd+V. Clipboard pixels stay in your browser.
Can I undo edits?
Yes. Undo and redo cover object creation, deletion, movement, style changes, crop, and rotation, with a limited in-memory history.
Does editing change image quality?
The viewport is scaled only for display. Export renders at the cropped source dimensions; JPG and WebP use the quality setting, while PNG is lossless.
Can I export as PNG or JPG?
Yes. PNG, JPG, and WebP are available. PNG preserves transparency; JPG uses a white background.
Are my screenshots uploaded?
No. Loading, annotation, effects, and export use browser APIs locally and no image pixels, filenames, or annotation text are sent to FiloTool.
Does the editor work on mobile?
Yes. Tools scroll horizontally, the canvas fits its workspace, and properties move beneath the canvas on smaller screens.
Can I edit a WebP image?
Yes, when the browser can decode WebP. Export can preserve WebP or convert the finished image to PNG or JPG.
Is there a file-size limit?
Yes. Files over 40 MB or images over 40 million pixels are rejected to reduce browser memory risk.
Need a focused workflow? Try the Image Pixelate, Image Cropper, or Image Resizer.