Is Invert Colours free to use?

Yes — completely free, with no sign-up and no watermark on the output.

Invert Colours

Invert all page colours for dark-mode reading. Free online — no sign-up, no watermark.

FreeNo sign-up No watermark

Fix, annotate and polish PDFs without heavyweight desktop apps — add watermarks, page numbers, headers, signatures and form fields, crop pages, fill forms and adjust colors right in the browser.

Accepts .pdf files. This tool uses secure in-memory processing on our server — files are never stored.

How to use Invert Colours

Upload your file — drag and drop it onto the page or click to browse.
Adjust the tool's options if needed, then run it.
Download the finished file straight to your device.

Frequently asked questions

Is Invert Colours free to use?: Yes — completely free, with no sign-up and no watermark on the output.
Is my file safe?: This tool uses secure in-memory processing on our server — files are never stored.
What files does Invert Colours accept?: Accepts .pdf files.

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