QKitBoxShipping label cropper — make it 4×6
Most marketplace labels arrive as a Letter or A4 PDF with the label in one corner. This tool crops the label out and rebuilds the page at 4×6 inches for thermal printers — vector-sharp, entirely in your browser.
Drop label PDFs here, or click to choose
Multiple files and multi-page PDFs are fine. Nothing is uploaded.
Preview
The preview shows the first processed page with the crop region marked. Every page gets the same treatment.
How to use — step by step
- Download the label PDF from your marketplace or carrier as usual — most arrive as a Letter or A4 page with the actual label printed in one corner.
- Drop it here. Multiple files and multi-page PDFs are supported; pages are processed in order.
- Start with Auto-trim: it finds the printed label by removing white margins and usually nails marketplace labels on the first try.
- If the page holds two labels, switch to Split and set rows and columns (2 labels side by side = 1 row × 2 columns).
- If the layout isn't detected, use Manual and drag a box exactly around the label on the preview.
- Choose the output size (4×6 inches for typical thermal printers, or A6) and download. Print at 100% scale — the page is already the right size.
How it works
The crop is vector, not a screenshot. The tool reads the label PDF, isolates the crop region as page objects, and re-embeds that region onto a fresh 4×6-inch page — text and barcodes stay razor-sharp at any printer resolution, and the file stays small. Nothing is rasterized and nothing is uploaded; the whole job runs in browser memory.
Auto-trim renders a low-resolution preview in memory, finds the bounding box of everything that isn't white, and adds a small safety margin. Presets divide the displayed page into halves or quarters for the common top-left layout. Split mode cuts the displayed page into an even grid — useful when a marketplace stacks two labels on one sheet.
If a page has a non-zero rotation flag, the tool compensates for it so the label comes out upright on the 4×6 page. Verify the preview before printing a full batch; if a rotated page looks wrong, manual crop is the reliable fallback.
Frequently asked questions
Why do I need 4×6 at all?
Thermal label printers (the common 4×6 desktop models) expect the page itself to be 4×6 inches. Printing a Letter-size label PDF on them scales, offsets or clips the label. A true 4×6 page prints edge-to-edge with no fiddling.
Will barcodes stay scannable?
Yes — the crop keeps the original vector content, so barcodes print at the same sharpness as the original. Avoid tools that flatten labels to images; rescanning an image degrades barcodes.
Is my label uploaded anywhere?
No. The file is parsed and rewritten inside this page. There is no upload step — the same privacy as every QKitBox tool.
My PDF is password-protected.
Protected PDFs can't be modified here. Remove the password first (open it with the password, save without security), then crop.
Can I split a page with two labels into two files?
Split mode outputs one PDF by default, with each label on its own 4×6 page. If you need separate files, run it twice with a page range.
Does it work with A4 labels?
Yes — presets and auto-trim work from the page's real dimensions, so A4 and Letter are both handled. The output size is your choice regardless of input.