Crop any image to the A4 document aspect ratio online for free. Perfect for printable flyers, documents, and posters at 210×297 mm. No upload — works in your browser.
The A4 paper ratio (210×297 mm, ≈1:1.414 portrait) — perfect for printable flyers, single-page documents, posters, and images destined for an A4 PDF.
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To crop an image to a A4 aspect ratio for free, open the omnikitbolt Crop tool, select the A4 preset, drag the crop box over the part of the image you want to keep, and download. The crop box locks to A4 so the proportions are always exact. Everything runs 100% in your browser — no upload, no signup, no watermark — and cropping removes only the pixels outside the frame, so there is no quality loss.
Open the omnikitbolt Crop tool and drop your image in. Supports JPEG, PNG, and WebP.
Choose the A4 ratio. The crop box locks to A4 — drag and resize it over the area you want to keep.
Download your perfectly cropped A4 image instantly. Everything stays in your browser — nothing is uploaded.
A4 is an aspect ratio — these are the pixel sizes people most often export after cropping. See the full A4 pixel dimensions table.
| Use | Pixels (W × H) |
|---|---|
| A4 print (300 DPI) | 2480 × 3508 |
| A4 draft (150 DPI) | 1240 × 1754 |
A4 portrait is 210×297 mm — crop to this ratio so your flyer or poster fills the page without white margins or trimming.
For crisp print, export the cropped A4 image at 300 DPI: that means about 2480×3508 px.
Leave a small safe margin inside the A4 frame for important text — home and office printers often clip the very edges.
For an A4 landscape layout, rotate your design and crop to 297×210 instead (the same ratio, sideways).
Ready to crop?
Use the Crop tool to crop your image to A4, or browse all aspect ratios.
A4 paper is 210×297 mm, an aspect ratio of about 1:1.414 (the square root of 2) in portrait orientation. At 300 DPI for print, A4 is roughly 2480×3508 px.
Open the omnikitbolt crop tool, choose the A4 ratio, frame your content, and export at 300 DPI (about 2480×3508 px) for printing. This fills an A4 page edge to edge with no trimming.
For sharp A4 printing, aim for 300 DPI, which is approximately 2480×3508 px in portrait. For on-screen or draft use, 150 DPI (1240×1754 px) is acceptable.
Cropping itself only removes pixels outside the A4 frame and keeps the rest at full quality. Quality issues only arise if the remaining crop is smaller than the print needs — keep it near 2480×3508 px for 300 DPI A4.
Crop to 2:3
The vertical version of 3:2 — perfect for Pinterest pins (1000×1500 px), portrait photo prints, and posters where height carries the composition.
Crop to 3:4
The portrait version of 4:3 — perfect for mobile portrait photos, e-commerce product shots, and vertical thumbnails that show more height than a square.
Crop to 5:4
The classic print ratio — perfect for 8×10 inch photo prints (the most common framed portrait size) and large-format photography.
Crop to 4:3
The classic standard — perfect for traditional photography, iPad and tablet screens, older monitors and TVs, and many presentation templates.
100% private
All cropping happens in your browser. Your images never leave your device — nothing is uploaded to any server.
Exact ratios
The crop box locks to the exact aspect ratio, so your output proportions are always perfect — no manual math.
Free, no limits
Crop as many images as you want. No watermarks, no sign-up, no daily caps on the free plan.
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