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Percentage Crop trims a chosen share of width and height from every image in a batch. Use it to remove borders, edge watermarks, scan margins, or uneven framing while keeping relative composition consistent across mixed file sizes.
Percentage crop is a proportional trim: you choose how much of each image to keep (for example 90% × 90%), and the tool removes the matching edge margin from every photo in one pass—ideal when pixel sizes differ but the unwanted border percentage is the same.
By Batch Image Crop Team · Last updated: 2026-08-12
Percentage crop is a batch image cropping method that trims by proportion instead of fixed pixels. If you keep 80% width, each image loses 10% from the left and 10% from the right relative to its own width. That makes results consistent for phone photos, DSLR exports, scans, and screenshots mixed in one folder.
Unlike a one-off manual crop, percentage crop is built for repetition: set the keep percentages once, preview the batch, then download a ZIP of every trimmed file.
These starting points cover frequent batch jobs. Adjust after you preview a few representative files.
| Goal | Typical keep % | Why it works |
|---|---|---|
| Light border removal | 95% × 95% | Removes a thin frame or scanner margin without cutting the subject |
| Standard edge cleanup | 90% × 90% | Common for photos with modest padding or soft vignette edges |
| Strong border / matte | 80% × 80% | Cuts deeper decorative borders while keeping the center subject |
| Side watermark only | 85% × 100% | Trims left/right more than top/bottom when marks sit on the sides |
| Top or bottom banner | 100% × 88% | Removes a header/footer strip while preserving full width |
Scanners often add a similar white margin on every page. A single percentage trim cleans the whole stack without measuring each scan in pixels.
When a studio mark or stock watermark sits near the border, proportional side trims can remove it across dozens of exports at once.
Phone, camera, and screenshot files rarely share the same pixel size. Percentage crop still applies the same visual margin to each file.
Catalog photos shot with similar padding can be tightened with one keep percentage so the product fills more of the frame consistently.
Browser or app screenshots often share chrome or status bars in the same relative position—percentage trim is faster than redrawing a box per file.
Sensitive photos never need to leave the device. The crop runs in the browser, then you download only the results you choose to keep.
Choose the mode that matches how your source files vary and how exact the output size must be.
| Mode | Best when | Watch out for |
|---|---|---|
| Percentage Crop | Mixed sizes need the same proportional edge trim | Final pixel dimensions still differ by source size |
| Pixel Crop | You need an exact width × height (for example 1200×800) | A fixed pixel inset behaves differently on small vs large images |
| Manual Crop | Subjects sit in different places and need per-image framing | Slower for large batches that share the same margin problem |
Preview a few edge cases—close-up faces, corner logos, or tall products—so the keep percentage does not clip important detail.
If a watermark sits only on one side, a centered percentage trim may remove useful content on the opposite side. Switch to manual crop for those outliers.
Percentage crop preserves relative framing, not a fixed canvas size. Switch to pixel or social presets when platforms demand exact dimensions.
Cropping cannot restore blur, heavy compression, or clipped subjects already present in the originals.
Percentage crop keeps a chosen share of each image. For example, 80% width and 80% height keeps the center 80% and removes about 10% from each edge.
Yes. Percentage crop removes the same proportion from every file, so mixed resolutions and aspect ratios still get a consistent trim.
Yes. Width and height percentages are independent, so you can trim more from the sides than from the top and bottom, or the reverse.
Percentage crop removes a proportional area. Pixel crop removes or targets fixed pixel amounts. Percentage crop is usually better for mixed-size batches; pixel crop is better when you need an exact output size.
No. Processing runs in your browser. Images stay on your device unless you choose to download the ZIP result yourself.
Not necessarily. Keeping 90% of a 4000px-wide photo yields a different pixel width than keeping 90% of a 1200px-wide photo. Use pixel crop afterward if you need identical dimensions.
Percentage-based cropping is a long-standing idea in professional image tooling: keep or cut a share of width and height rather than a fixed pixel box. The references below explain the underlying geometry and browser drawing model this page builds on.
Quoted official wording
ImageMagick geometry notes that when a size is given with a percent sign, the value is interpreted as a percentage of the image’s width or height—so a proportional crop scales with each source file instead of assuming one shared pixel size.
ImageMagick
Command-line Processing — Geometry
Used for: Percentage-based width/height geometry for proportional crops
https://imagemagick.org/script/command-line-processing.php#geometry
MDN Web Docs
CanvasRenderingContext2D.drawImage()
Used for: Browser canvas source-rectangle cropping model used by client-side tools
https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/drawImage
This page helps with proportional batch trimming in the browser. Always preview edge cases and switch to pixel or manual crop when a job needs exact dimensions or off-center framing.
Percentage Crop is part of the complete Batch Image Crop toolkit. Depending on your workflow, you can also choose other crop modes below.
Freely drag and resize the crop area on each image.
Crop to exact pixel dimensions like 800×600 or 1920×1080.
Preset dimensions for Instagram, Facebook, TikTok, YouTube, and more.
Crop images into circles, rounded rectangles, or custom shapes.
Prepare passport, visa, and ID-style portraits with document size presets.
