littletools.
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Check a file.

Check size, format and image dimensions.

Processed on your device. Your files are never uploaded.
  1. 1Upload
  2. 2Requirements
  3. 3Results
Step 1 of 3

Choose your file

Select files from your device to get started.

Files and settings

No files selected yet.

How to use Check a file

  1. Choose a file.
  2. Enter the upload requirements.
  3. Run the check and review each result.

Formats and limits

PDF, JPG, PNG, and WebP. Up to 25 MB; images up to 24 megapixels.

What to expect

This tool produces a report and does not modify your file. Pixel checks apply to images. It does not check a document’s content or every rule of a receiving website.

Try it for

Check whether an image fits a portal’s size and pixel requirements.

Your files and text stay on your device

Processing runs in your browser. File contents and pasted text are not sent to a conversion server. The website and its fonts still require network connections. Close the tab to release your workspace.

Frequently asked questions

Will this fix a file that fails?

No. Use resizing, conversion, or compression tools to address the reported mismatch, then check again.