A4 → 4×6 converter · runs on your device

Turn A4 label PDFs into 4×6 thermal labels

Q: Can I keep the invoice as well?

Yes. Choose Label + invoice to print each invoice right after its label on the same roll, or use Invoices (A4) to print all invoices separately on normal paper.

Q: Why is my printed barcode blurry or not scanning?

Almost always a driver setting: print at 100% / Actual size (not “Fit to page”), set the paper to 4 × 6 in, slow the print speed down and raise darkness one step. Label Crop AI keeps the label as vector graphics, so the barcode itself is not degraded by cropping.

Marketplaces hand you A4 pages with a small shipping label and an invoice on each. Drop the PDF here: every label is cut to its border and sized for a 100 × 150 mm thermal roll, one label per sticker.

No upload, no login
4×6 thermal & A4
SKU sort & picklist

The problem

Why an A4 label PDF prints badly on a 4×6 roll

Send an A4 page straight to a thermal printer and the driver shrinks the whole sheet — label, invoice and white space — onto one small sticker. The barcode ends up tiny and often will not scan. Converting first fixes that: only the label is kept and it fills the sticker.

Label cut tight to its border on every page, even when address lengths vary
Tax invoice separated — drop it, keep it after each label, or print it on A4
Wide labels (Meesho) rotated automatically to use the full 4×6 height
Vector output: barcodes and QR codes stay sharp at any size
Also 4×4 in and 3×5 in rolls, if that is what your printer takes

How it works

A4 to 4×6 in four steps

01
Download the label PDF
Get the label file from your seller panel exactly as it comes — no editing needed.
02
Drop it here
Smart Detect finds each label and invoice. The paper is already set to 4 × 6 in.
03
Check the preview
Every page of the output is previewed before you print. Use Adjust crop if a layout is unusual.
04
Print at actual size
Print at 100% on 4 × 6 in (100 × 150 mm) labels with no margins.

Printer settings

Driver settings for any 4×6 thermal printer

These work for TSC, Zebra, Xprinter, TVS, Gprinter and other 4-inch direct thermal printers.

Setting	Use	Why
Paper / stock size	4 × 6 in (100 × 150 mm)	Must match the label roll, otherwise the printer stretches or skips labels
Scale	100% / Actual size	“Fit to page” shrinks the label and softens the barcode
Margins	None / 0	The PDF from Label Crop AI already has the right margins
Orientation	Portrait	Wide labels are already rotated to fit the roll when Auto-rotate is on
Media type	Labels with gaps (die-cut)	Lets the sensor find the gap between stickers so each print starts on a new label
Darkness	Start mid-range, raise one step at a time	Too light gives broken bars; too dark makes bars bleed together
Print speed	A slower setting	Slower printing gives crisper barcodes on almost every thermal printer

FAQ

Questions sellers ask

What size is a 4x6 label in millimetres?

4 × 6 inches is about 100 × 150 mm (101.6 × 152.4 mm exactly). Most Indian label rolls are sold as 100 × 150 mm and work with the 4 × 6 in setting.

Will the label be rotated?

Only when it helps. Meesho labels are wider than they are tall, so Auto-rotate turns them 90° to fill the roll. Flipkart and Amazon labels are already upright. Switch Auto-rotate off if you prefer no rotation.

Can I keep the invoice as well?

Yes. Choose Label + invoice to print each invoice right after its label on the same roll, or use Invoices (A4) to print all invoices separately on normal paper.

Why is my printed barcode blurry or not scanning?

Almost always a driver setting: print at 100% / Actual size (not “Fit to page”), set the paper to 4 × 6 in, slow the print speed down and raise darkness one step. Label Crop AI keeps the label as vector graphics, so the barcode itself is not degraded by cropping.

Is my customer data safe?

Yes. The PDF is opened and cropped by code running in your own browser. The file, customer names, addresses and order numbers are never uploaded. The only thing the site records is an anonymous count of how many labels were cropped.

Is it free, with no daily limit?

Yes. There is no signup, no watermark and no page or daily limit. Processing happens on your device, so there are no per-file server costs to pass on.

Convert your A4 labels to 4×6 now

Free, no signup. Your PDF is processed in your own browser and never uploaded.

Choose PDF files

Free on Google Play

Label Crop Tool for e-Commerce

Crop Meesho, Flipkart, Amazon and Snapdeal shipping labels directly on your Android phone. Print to 4×6 thermal printers via Bluetooth or Wi-Fi in seconds — 100% free with offline on-device privacy.

4×6 thermal rolls & A4 sticker sheets
Bluetooth, USB & Wi-Fi printers (TSC, TVS, Zebra, Xprinter)
High-contrast crisp barcode scanning
100% on-device & offline friendly

GET IT ON Google Play

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Turn A4 label PDFs into 4×6 thermal labels

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Why an A4 label PDF prints badly on a 4×6 roll

A4 to 4×6 in four steps

Download the label PDF

Drop it here

Check the preview

Print at actual size