filetity

IMAGE -> INVERTED · Local tool

Invert image colors

Flip every colour in an image to its opposite.

Last updated

  1. 01 / Your device

    the file stays here

  2. 02 / Browser memory

    the work runs locally

  3. 03 / Back to you

    saved on this device

When you would use this

Situations, not settings.

A scan that came out as a negative
Some scanners and X-ray exports invert by default. One pass puts it back.
Reading a dark screenshot on paper
A dark mode capture prints as a solid black rectangle. Inverting makes it legible and uses far less ink.
Checking a design in the opposite theme
A quick invert shows whether the contrast still holds before you build the other theme properly.

How it works / no cloud

A conversion engine, not an upload form.

filetity reads the pixels into browser memory and replaces each red, green and blue value with 255 minus itself. Transparency is left alone, so an image with a transparent background keeps it rather than turning solid.

  • Offline ready
  • Installable app
  • No file limit queue

Straight answers

No accordion. Nothing hidden.

Is it free?
Yes, with no watermark and no page limit.
Does it need an account?
No. There is no account system.
Is my file processed on my device?
Yes. The file is read by your browser and never uploaded. There is no server to send it to.
What formats are supported?
JPG, PNG and WebP in. The same format out, so nothing else about the file changes.
What are the limits?
No image count limit. Very large images are bounded by the memory your browser gives a canvas.
Does it work on mobile?
Yes, on any modern mobile browser. Large files are limited by the memory the phone gives the browser.
Does it work offline?
Yes, after you have used it once. Your browser keeps what the tool needs, so it then works with no network connection.
What does inverting an image actually do?
It replaces every colour with its opposite: white becomes black, red becomes cyan, and a photograph becomes something that looks like a film negative. Applying it twice returns the original exactly.
Can I use this to read a film negative?
Partly. Inverting is the first step and it will make the image readable, but scanned colour negatives also carry an orange base layer that inverting alone does not remove, so colours will look cold. For black and white negatives the result is usually good straight away.
Does it change my transparent background?
No. Only the colour channels are inverted. Alpha is left exactly as it was, so a transparent PNG stays transparent instead of turning into a solid block.
Can I invert several images at once?
Yes. Drop as many as you like; each is processed on its own and they arrive together in a ZIP, with -invert added to each file name.
Does a JPG lose anything on the way through?
A little, because a JPG has to be re-encoded after its pixels change. It is written at quality 92, so the loss is hard to see. A PNG is written exactly.
Is there a strength setting?
No. Inverting is exact, 255 minus each value, and there is no half-way version of it. Applying it twice gets the original back, which is the nearest thing to undo.

Keep working locally

7 available · more coming