IMG_1022.jpg
A few kilobytes of EXIF, often including a small embedded thumbnail.
How much of your image is metadata?
Measure the bytes of EXIF, XMP, IPTC, C2PA and PNG text in your image and their share of the file.
Inspect supported file records without editing the original.
How much of your image is metadata?
Usually a little. Sometimes a lot.
Most photos carry a few kilobytes of metadata. Some carry far more: an embedded thumbnail, a long edit history, a Content Credential, or a ComfyUI workflow can add tens or hundreds of kilobytes.
This calculator measures each supported metadata block, including its headers, and shows the total and its share of the file.
Run it on an original and a cleaned copy to see exactly what cleaning removed.
Typical metadata sizes
| Phone photo | Usually a few kilobytes of EXIF, plus an embedded thumbnail |
|---|---|
| Edited photo | XMP edit history can add tens of kilobytes |
| Signed AI image | A C2PA manifest with certificates can be the largest block |
| ComfyUI PNG | A saved workflow can add tens of kilobytes of text |
How to measure metadata size
Upload and read the numbers.
Upload images
JPG, PNG or WebP, up to 30 at a time.
Read the totals
Block count, bytes and share of the file are shown for each image.
Compare
Measure a cleaned copy next to the original.
What usually makes metadata large
Typical heavy blocks.
| Block | Why it is large | Measured here |
|---|---|---|
| EXIF thumbnail | A small JPEG preview stored inside the photo. | Yes |
| XMP edit history | Long lists of edit steps from Photoshop or Lightroom. | Yes |
| C2PA credential | Signed manifests with certificates and thumbnails. | Yes |
| ComfyUI workflow | The full node graph saved as PNG text. | Yes |
Unknown blocks are not counted. The result is a measurement, not a prediction of download size.
JPG, PNG and WebP still images. Up to 30 files, 15 MB each. Images up to 50 megapixels; animated PNG and WebP are not supported. Free, no account.
Examples
How much of a file metadata can take up.
ComfyUI_00003_.png
The saved workflow can add tens of kilobytes of text.
firefly-image.jpg
A C2PA credential with certificates is often the largest block.
photo-cleaned.jpg
Measure it next to the original to see exactly what cleaning removed.
Metadata calculator: common questions
Answers about results, privacy and limits.
Is the file size stored in metadata?
No. Metadata stores pixel dimensions, not the file size. The file size is just the size of the file on disk.
Will removing metadata make my file much smaller?
Only when metadata is a large share. For most camera photos it's a small percentage.
Do the numbers include headers?
Yes. Each block is measured with its container headers. Unknown blocks are not counted.
Does the count include headers?
Yes. Each block is measured with its headers.
Is it free? Do I need an account?
Yes. It is free, with no account, credits or trial. The file and batch limits are shown on the upload box.
Do my files leave my device?
No. Files are read in your browser. Save your results before you clear the batch or leave the page.
Measure your image’s metadata
Free, instant, in your browser.