Image Flipper (Horizontal & Vertical)
Flip images horizontally (mirror) or vertically (upside-down). Browser-side, no upload.
What is Image Flipping?
Image flipping mirrors an image along an axis — horizontal flip swaps left and right (mirror image); vertical flip swaps top and bottom (upside down). Different from rotation: rotation pivots around a point; flipping reflects. Browser-side Canvas API handles flipping instantly without any upload. Common uses: undoing front-camera selfie mirroring (which produces backwards text/lettering), artistic photography effects, animation frame reuse, checking logo symmetry, creating mirror text watermarks, kaleidoscope/symmetry art generation, undoing scanned image orientations.
How to use this tool
- Upload image — Any common format — JPG, PNG, WebP.
- Choose direction — Horizontal (left-right mirror), Vertical (upside-down), or Both.
- Preview live — Flipped result shows immediately.
- Download PNG — Flipped image saved to your device.
Flip math
Horizontal flip: Set scale (-1, 1), translate (width, 0). Each pixel at x → (width – x).
Vertical flip: Set scale (1, -1), translate (0, height). Each pixel at y → (height – y).
Both: Equivalent to 180° rotation.
Done via HTML5 Canvas transformations — pixel-perfect, no quality loss.
Examples
- Selfie un-mirror: Phone front camera flips selfies; un-flip to see normal view (text readable)
- Logo symmetry check: Flip logo to verify symmetric design
- Animation frame: Use one walk frame, flip for opposite direction
- Mirror watermark: Vertical-flipped watermark is harder to remove
- Kaleidoscope effect: Combine flips with copies for symmetric art
Tips & best practices
- Horizontal flip changes left/right hands in photos — check if that matters
- For text in photos, flipping makes it backwards — usually undesirable
- Asymmetric subjects (faces) look noticeably different flipped
- Symmetric subjects (geometric patterns) unchanged by flip
- 180° flip = both horizontal AND vertical — same as rotating twice 90°
Frequently Asked Questions
Is flipping the same as rotating?
No. Rotation pivots image around a point (chirality preserved). Flipping reflects across an axis (chirality reversed — left becomes right).
Why does my selfie look backwards on save?
Phone front cameras typically un-mirror before saving so text appears correctly. If your phone saves mirrored, use horizontal flip to fix.
Will flipping reduce quality?
No — flip is lossless. Each pixel moves to new position; no resampling or compression.
Can I flip just part of an image?
Not in this tool — flips whole image. Use Photoshop, GIMP, or Photopea for partial flips.
Does flipping change file size?
Essentially no — same pixel data, just reorganized. PNG/JPG sizes may differ by 1-2% due to compression algorithm response to new pixel patterns.