Auto crop image whitespace
Remove transparent padding around icons, stickers, logos, and pixel art without drawing a manual rectangle.
Content boundsAutomatic empty-edge remover
Trim Image to the visible content
Use Trim Image to find the useful pixel bounds automatically, remove transparent or solid-color borders, and keep an optional safe margin without guessing a crop box.
One image at a time, processed locally in your browser and exported as PNG.
Trim Image with an automatic crop suggestion
Upload, paste, or drop one PNG, JPG, or WebP. The suggested box updates as you change border mode, threshold, safe margin, or individual sides.
Suggested crop
- Original size
- —
- Trimmed size
- —
- Top
- 0 px
- Right
- 0 px
- Bottom
- 0 px
- Left
- 0 px
Working with animation frames or aligned sprites? Do not trim each frame independently unless you also preserve a shared canvas or record each frame offset.
Your source image stays on this device. Pixel analysis, preview, cropping, and PNG export happen in the browser.
Crop preview
Drop an image to find its content bounds
Trim Image will propose a crop box and report exactly how many pixels can be removed from every side.
You can also drop a file here or paste an image from your clipboard.
Choose an image to generate a trim suggestion.
When to Trim Image instead of using another crop
Empty-border removal follows pixel content; composition and aspect-ratio tools solve different problems.
Crop to a target aspect ratio
Use the ratio changer when the goal is 1:1, 4:3, 16:9, or another layout rather than empty-edge removal.
CompositionMake a background transparent first
If a busy background surrounds the subject, remove that color before finding the new transparent bounds.
Background cleanupTrim Image for transparent pixels, white borders, and padding
The preview makes the boundary visible before any download is created.
Trim transparent pixels without losing soft edges
Start with a low alpha threshold so a faint shadow or semi-transparent antialiasing stays inside the crop. Increase it only when the translucent edge is genuinely unwanted.
Remove white border from image with a safe margin
Use white-border mode for clean exports and scanned graphics. Add a few pixels of margin when an icon, shadow, or product should not touch the new canvas edge.
How to Trim Image edges accurately
A quick three-step check keeps important pixels inside the result.
01
Trim Image after upload or paste
Choose transparent, white, or custom-background detection. The teal rectangle marks the proposed content boundary on the original canvas.
- Use transparent mode for PNG alpha
- Use white mode for scans and flat exports
02
Tune threshold, sides, and safe margin
Lower the threshold if shadows disappear. Disable a side when its existing spacing matters, and add margin when the subject needs breathing room.
A threshold is not object recognition: isolated dust, noise, or one non-background corner pixel can expand the detected boundary.
03
Preview, restore, then export
Compare the trimmed preview with the original, confirm the four pixel counts and final dimensions, then download a PNG that preserves transparent pixels.
The tool does not resample the kept pixels, so trimming changes canvas dimensions rather than image detail.
Trim Image FAQ based on common searches
Practical answers about transparent borders, white space, thresholds, privacy, and aligned assets.
How do I Trim Image transparent pixels online?
Upload a PNG or WebP, keep Transparent edges selected, inspect the teal suggestion, then open the trimmed preview. A low threshold removes fully transparent padding while keeping most faint alpha details.
What does the transparent-pixel threshold change?
It sets the maximum alpha treated as empty. At a low value, semi-transparent shadows count as content; at a higher value, more translucent pixels can be excluded. Always compare both previews before export.
How can I remove white border from image files?
Choose White border mode. Exact white is removed at zero tolerance; raising the color threshold can catch near-white JPEG compression, scan noise, or uneven paper, but an aggressive setting may also cut pale content.
Can Trim Image remove a custom solid background?
Yes. Select Custom background, choose the border color, and tune the color threshold. This crops the canvas to pixels that differ from that background; it does not erase the background inside the kept rectangle.
Why does one edge refuse to auto crop image whitespace?
A shadow, compression artifact, scan speck, or stray pixel may count as content. Check the original view, choose the correct mode, and adjust the threshold gradually. The detector keeps every matching content pixel inside one rectangular bound.
What happens if the uploaded image is fully transparent?
The tool reports that no visible content was found and does not create a confusing 1 × 1 output. Lower the alpha threshold only if the file contains very faint pixels that you intentionally want to preserve.
Does trimming reduce image quality or resolution?
No kept pixel is resized or resampled. Only outer rows and columns are removed, and the result is encoded as PNG. The width and height change, but the retained artwork stays at its original pixel scale.
Is this different from changing image aspect ratio?
Yes. Trim Image follows detected content and removes empty edges. An aspect-ratio crop follows a requested shape such as square or 16:9 and may intentionally cut content or add padding.
Can I trim animation frames or sprites without alignment jumps?
Do not independently tighten frames that must share an origin. Keep a uniform canvas or record each crop's x and y offset, then restore those offsets during playback or sprite-sheet packing. This first version handles one still image at a time.
Are my images uploaded while I crop image whitespace?
No. The browser reads the file, detects pixels, renders previews, and creates the PNG locally. Nothing in this workflow needs to send your source image to a server.
Trim Image and remove empty borders now
Find transparent, white, or custom-color bounds and inspect every removed edge.
Keep a safe margin, restore the original view at any time, and export a local PNG.
Single-image trimming is available now; aligned frame sets need a shared canvas or stored offsets.