File size & image checker
See a file's size, detected type, image pixel dimensions or PDF page count without uploading it, so you can check it against an upload limit.
How to use this tool
- Choose a file.
- Read its size, detected type and, for images or PDFs, pixels or page count.
Before you start
Upload limits are usually stated in KB or MB, and photo fields often state pixel sizes too. Pick a file to see its exact size, what type it really is and, for images and PDFs, the pixel dimensions or page count. This is useful before an upload fails, or to confirm that a resized file now meets the limit. The file is read locally and never sent anywhere.
When to use it
- Checking whether a file is under a form's KB or MB limit.
- Confirming the pixel size of a photo.
- Finding out if a renamed file is really the type it claims.
Limits
Detection checks common types only. Metadata such as location is not shown.
Privacy and file handling
The file is read on your device and not uploaded.
Troubleshooting
A mismatch between reported and detected type often means the file was renamed.
Frequently asked questions
Why does the detected type differ from the extension?
The tool reads the start of the file. If someone renamed a file, the detected type shows what it really is.
Does it show location or camera data?
No. Metadata such as location is not shown.
Is the file uploaded?
No. It is read on your device.
Helpful guides
Why an application rejects your photo or file · Resize a photo to a target size in KB