Is Invert colours free?

Yes. Invert colours is completely free, with no sign-up, no watermark and no daily limits.

Are my files uploaded when I use Invert colours?

No. Invert colours runs entirely in your browser. Your files are processed on your device and are never sent to a server, so we can't see or keep them.

Does Invert colours work on my phone?

Yes. It works in modern browsers on Android, iPhone, iPad, Windows, Mac and Linux — no app to install.

Does it work offline?

Yes. After the page has loaded once, the tool keeps working even if you turn off your internet connection.

Is there a file size limit?

There's no fixed limit. Because processing happens on your device, the practical limit is your device's memory — most handle large files comfortably.

Invert colours

Recolour every page for easier reading on screen.

No uploadNo sign-upNo watermark

1Add files
2Adjust
3Download

Drop your PDF here

or choose a file from your device · PDF

Files open in this tab and are never uploaded.

How do I use Invert colours without uploading?

Open LocalPDF Invert colours, add your PDF, adjust the settings and click Recolour. Everything runs in your browser, so your file is processed on your own device and never uploaded. It's free, needs no account and adds no watermark.

1
Add your PDF
Drag it onto the page or choose it from your device. It opens in this tab — nothing is uploaded.
2
Adjust the settings
Tweak the options in the settings panel, or keep the recommended defaults.
3
Recolour
Processing runs on your device in seconds. Download the result or continue with another tool.

Invert colours FAQ

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Edit PDF

Add text, images, shapes and highlights.

Sign PDF

Draw, type or upload a signature and place it.

Fill PDF form

Type into fillable fields and lock the answers.

Add watermark

Stamp text or a logo across pages.