3x4 Inch
Resize a Picture to 3x4 Inch
A 3 × 4 inch picture is 76 × 102 mm, which is 900 × 1200 pixels at 300 DPI. Upload a photo and it is center-cropped to the 3:4 portrait shape and saved as a 20 to 500 KB JPEG for printing or a badge. If your form says 3 × 4 cm, that is a much smaller passport size (354 × 472 px).
- Runs in your browser
- Nothing uploaded
- No sign-up
- Free, no daily limits
- 1Add your file
- 2Choose settings
- 3Download
Last updated
A 3×4 inch photograph is a widely used vertical format for desktop photo frames, pocket scrapbooks, student identity badges, and institutional credential cards. This browser-based tool scales and center-crops your picture into an exact 900×1200 pixel JPEG file at 300 DPI print quality. All image operations execute locally in your web browser through HTML5 Canvas, ensuring personal portraits remain private on your device.
The tool center-crops the source photo to fit a 3:4 vertical aspect ratio and runs a compression loop targeting a file size between 20 KB and 500 KB. For international visa or passport dimensions, use our 2x2 inch resizer or 35 × 45 mm resizer, and prepare custom photo layouts with our Crop Image tool.
How it works
1. Upload portrait photograph
Click Upload Photo or drop your file into the upload zone. JPG, PNG and WEBP formats open across all browsers. Safari supports iPhone HEIC files, while other browsers require JPG or PNG format.
2. Confirm dimension specifications
Review the preset specifications panel displaying 900×1200 Pixels, 3×4 in Inches, 300 DPI Resolution, and the 20 to 500 KB File Size target range.
3. Execute crop and quality compression
Click Resize Photo. The tool draws the image to canvas, crops excess margins to preserve the 3:4 ratio, and searches JPEG quality factors to stay under 500 KB.
4. Review specifications and download JPEG
Inspect the output confirmation badge. Files between 20 KB and 500 KB display Ready to use. Files under 20 KB receive trailing zero-byte padding. Click Download to save your image.
When you'd use it
Mini picture frames and tabletop displays
Preparing 3×4 inch portrait photos sized for compact acrylic blocks, bedside photo stands, and tabletop frames without distortion.
Pocket photo albums and scrapbooks
Formatting portrait photos to fit standard sleeves in miniature family albums, craft keepsakes, and travel journals.
Student identification and campus badges
Creating vertical 3:4 aspect ratio portraits for school administration cards, campus library passes, and academic registries.
Corporate security lanyards and visitor passes
Standardizing employee and contractor portrait headshots for vertical identification cards, access lanyards, and security desk records.
3x4 inch dimensions in pixels across different DPI settings
In physical measurements, 3×4 inches equals 76.2 mm wide by 101.6 mm high. Calculating pixel dimensions requires multiplying physical inches by the target Dots Per Inch (DPI). At the photographic print standard of 300 DPI, multiplying 3 inches by 300 yields 900 pixels, and 4 inches by 300 yields 1200 pixels, producing an image with approximately 1.08 million pixels.
When printing at home or through a photo kiosk, ensure your printer scaling is set to 100% or Actual Size rather than fit to page so the physical print matches 3×4 inches exactly. If you are printing multiple portraits, two 3×4 inch images fit neatly onto a single 4x6 inch photo print for easy trimming.
| Resolution (DPI) | Width (3 in) | Height (4 in) | Total Megapixels |
|---|---|---|---|
| 72 DPI | 216 px | 288 px | 0.06 MP |
| 96 DPI | 288 px | 384 px | 0.11 MP |
| 150 DPI | 450 px | 600 px | 0.27 MP |
| 200 DPI | 600 px | 800 px | 0.48 MP |
| 300 DPI (This Tool) | 900 px | 1200 px | 1.08 MP |
| 600 DPI | 1800 px | 2400 px | 4.32 MP |
Which applications and identity cards use 3×4 inch photos?
Many online searchers confuse 3×4 inches with 3×4 centimetres. A 3×4 inch print measures 76.2 × 101.6 mm (900 × 1200 pixels at 300 DPI), whereas a 3×4 cm photo measures only 30 × 40 mm (354 × 472 pixels at 300 DPI). The two formats share the same 3:4 aspect ratio, but an inch print contains roughly six times the surface area.
Academic institutions and private organizations frequently specify 3×4 inch photos for laminated visitor passes, library borrower cards, and student administrative folders. For international passport or official government visa filings, most consular authorities specify metric 35×45 mm or square 2×2 inch standards rather than 3×4 inches (Canada uses 50×70 mm and China uses 33×48 mm). While 3×4 inches serves student cards and framed badges, recruitment and academic boards specify distinct standards: RRB NTPC and NEET UG require 3.5 × 4.5 cm (30–70 KB), while DSSSB mandates a 5×7 inch postcard format (50–300 KB).
How center-cropping works and how to prevent cut-off subjects
Most smartphones capture photos in 4:3 (horizontal) or 3:4 (vertical), while dedicated digital cameras commonly capture in 3:2. To fit a 3:4 vertical frame without stretching, the tool calculates the difference in proportions and performs a center crop. If your photo is wider than the 3:4 ratio, equal portions are trimmed from the left and right sides. If it is taller, equal portions are trimmed from the top and bottom.
Because this process simply cuts away everything beyond the central 3:4 boundary, an off-center subject risks having part of their head, hair, or shoulders cut off. If the subject is not centered in the original capture, crop the picture manually using an image editor before uploading to ensure proper framing.
Canvas background underlay and JPEG compression behavior
Before the tool draws your image, the canvas fills with white (#ffffff). This background color is visible only through transparent sections of transparent PNG files. The tool does not alter, lighten, or clean the background of ordinary opaque photos, and it does not remove shadows. For optimal results, photograph your subject against a clean, uncluttered background with balanced lighting.
Compression runs as a quality search between 1.0 and 0.1 on the 900×1200 canvas, stopping at the highest setting that keeps the JPEG within 500 KB. Anything smaller than 20 KB is topped up to 20 KB with trailing zero bytes after the image data. Should a high-noise image stay above 500 KB even at the 0.1 floor, the page reports an error and offers no file, rather than a JPEG that breaks the preset.
Check before you upload: if formatting an identity image for an exam or registration portal, check your file dimensions in our Document Checker.
Frequently asked questions
What is 3x4 inches in pixels?
At 300 DPI print resolution, a 3×4 inch photo translates to exactly 900 pixels horizontally by 1200 pixels vertically. At 200 DPI it is 600 × 800 pixels, and at 96 DPI screen preview it is 288 × 384 pixels.
What is the difference between a 3x4 inch and a 3x4 cm photo?
While both share a 3:4 vertical aspect ratio, a 3×4 inch photo (76.2 × 101.6 mm) is much larger than a 3×4 cm photo (30 × 40 mm). A 3×4 inch print requires 900×1200 pixels at 300 DPI, whereas 3×4 cm requires 354×472 pixels.
How do I print a 3x4 inch photo on standard photo paper?
You can place two 3×4 inch photos side by side on standard 4×6 inch photo paper at a commercial lab or home photo printer, and then cut them out along the border lines.
Does this tool remove background shadows from my photo?
No. The resizer paints white on the canvas, which only shows through transparent pixels in files like PNG. It does not remove shadows or edit existing backgrounds on regular photos.
Why were the sides of my picture cut off?
The tool center-crops the input to maintain a 3:4 vertical proportion. If your source photo was shot in a wider format like 16:9 or 3:2, excess sides are cut away. Pre-crop your image manually to center your subject.
Are my personal photos uploaded to an external server?
No. All cropping, canvas scaling, and JPEG compression routines execute locally within your browser memory. No photos are ever transmitted over the network.