Calculator
What the Flip Image does
Flip Image: mirrors the image horizontally or vertically by drawing it through a negative canvas transform, so pixels are moved rather than resampled and no quality is lost. Everything runs in your browser and the file is never uploaded.
Pick a file and the Flip Image calculates it right here in the page. The work happens inside your browser tab, so there is no upload to wait for and no queue.
Getting the dimensions right before upload avoids a lot of downstream cropping. The Flip Image exists to take that particular chore off your hands.
Everything happens inside this page. Nothing you type is sent to a server, and there is nothing for us to store.
The field table, the method and a worked example are documented after the tool for anyone who wants to check the working.
What do the Flip Image fields mean?
The Flip Image uses 2 inputs. It opens with a complete example loaded, which is usually the quickest way to understand what a field means.
| Field | What to enter | Default |
|---|---|---|
| Image file | stays on your device | none |
| Flip | choose from Horizontal or Vertical | Horizontal |
How does the Flip Image work?
Each output is derived from the inputs above in a single pass; there is no hidden state carried between runs, so the same inputs always give the same calculation.
Validation runs before the calculation, which is why a mistyped value shows an error rather than a plausible-looking result.
What a typical run looks like
You provide: Image file and Flip
What happens: the file is read into memory by your browser, processed locally, and offered back as a download. It is never uploaded.
You get back: a new file plus a brief account of what happened to it, shown in the panel.
How long this takes is a property of your computer, not of our infrastructure, and file size is bounded by browser memory.
How to use it
- Choose your file under Image file, or drag it onto the drop area.
- Pick a value for Flip: the options are Horizontal or Vertical.
- Press Flip.
- Check Status on the right.
- To keep the result, either copy the link or print the page. Both preserve what is on screen.
What this tool does not do
- Re-encoding a lossy format such as JPEG always loses some detail, even at maximum quality.
- EXIF metadata may be dropped during processing, which is usually desirable but is worth knowing.
- Values outside the documented ranges are rejected rather than approximated.
- Large files are limited by your available memory, not by an upload quota.
Frequently asked questions
Image file and Flip. That is the whole form. Defaults are loaded for all of them, so the form is usable immediately, without filling anything in first.
No. The file is read by your browser and processed inside the page. It is never sent to us, which is also why it keeps working offline once loaded.
It is free with no conditions: no sign-up, and no limit on how often you use it.
It follows the standard definition for this operation, so the result matches what a reference implementation would give.