Dimensions in pixels
Width × height is the number of pixels, such as 1200 × 900. Turning a photo changes its displayed dimensions. This finder checks the orientation your browser displays.
Free · No sign-up · Files stay on your device
Image size finder.
Check image resolution in pixels, file size in KB and aspect ratio. Compare a whole batch with your upload requirements. Fix only the files that fail.
Find your image size.
Choose, drop or paste images. Results appear immediately.
40 MB / 32 MP per image · 256 MB per batchCheck against requirements Optional
No requirements applied.
Choose your images to see their dimensions and size.
What size is my image?
File size in KB and bytes
File size is the storage used by the actual file. Equal pixel dimensions do not mean equal file sizes. The exact byte count is shown alongside KB.
Aspect ratio
Ratio describes the shape: 1200 × 900 is 4:3; 1200 × 1200 is 1:1. A square requirement can be met by adding edges or cropping; you choose before any repair.
Check image dimensions: width and height in pixels
Add your files above to see the displayed width × height for every image. A 1200 × 900 photo has a pixel resolution of 1,200 by 900 and a 4:3 aspect ratio. Rotated photos are measured as your browser displays them. Pixel resolution is different from print DPI: this checker does not read embedded DPI or infer print quality.
Image aspect ratio finder for a batch
The ratio describes the shape, not the number of bytes: 1200 × 900 is 4:3, while 640 × 960 is 2:3. Compare images with a square, landscape or portrait requirement in Check against requirements. Export a CSV to review dimensions, file sizes and pass/fail results together. Checking does not modify the originals.
Image size checker for upload requirements
Need images at least 1200px wide, square and under 200 KB? Add the requirements and select Apply. Each image shows what passes and what needs changing. Select Repair failing images to review the choices. Already passing files stay unchanged; repaired files are reopened and checked before they can be saved.
Batch resize multiple images at once → · Compress images to 100KB or 200KB → · Find saved files on Android or iPhone →
A repeatable file-size check
Checked on 16 October 2026 with Jofun v1.6.0 in a desktop browser. These are synthetic test images, not customer photos or a speed benchmark. Choose the three sample images, set a 200 KB maximum with no other requirements, and repair the one failing file as JPG. The other two files stay unchanged.
| Image | Original | Saved file |
|---|---|---|
| Noise JPG | 1200 × 900 · 1,274,228 bytes | 1200 × 900 · 199,083 bytes |
| Rotated JPG | Displayed 640 × 960 · 10,304 bytes | Original bytes unchanged |
| Transparent PNG | 960 × 640 · 3,185 bytes | Original bytes unchanged |
Download the verified three-file ZIP. ZIP CRC, image dimensions and unchanged originals were independently checked. Encoders vary by browser; verify your own files.
Are my photos uploaded?
No. Reading and repairs happen in your browser. Optional usage measurement records event counts, without images, filenames or image metadata. A CSV report contains filenames and measurements and downloads only to your device.
Can I check multiple images at once?
Yes, up to 100 still JPG, PNG or WebP files, with a 40 MB and 32 MP limit for each image and 256 MB per batch. Unsupported or unreadable files show their own errors; other results remain available. HEIC, GIF, SVG and animated images are not supported in this release.
Does repairing an image change my original?
Your source file stays unchanged. Repairs create new files and may change quality, color and transparency. Padding uses white; JPG fills transparency with white. Metadata is removed from repaired images. Unmodified passing files in a ZIP keep their original bytes and metadata, which may include location information.
What if a requirement cannot be met?
Small images need your explicit permission to enlarge; enlargement does not add detail. A strict KB limit may not be possible at the required dimensions. The file stays marked as needing changes instead of being offered as a passing repair. Increase the KB limit, choose JPG or WebP, or adjust the minimum dimensions.
Where do the downloads go on my phone?
On Android, open the browser’s Downloads menu. On iPhone, use Safari’s download list and the Files app. Open the downloaded ZIP or CSV to confirm it saved; starting a download is not proof of saving.