Fix your file. Get it uploaded.

Upload a file, tell us where it needs to go, and find out what's stopping it from working.

Choose a file See how it works

Checks happen in your browser No account needed

File check

Start with your fileChoose a JPG, PNG, WebP, GIF, HEIC or PDFChoose file

Inspect what you haveFormat, size and available dimensions

Compare the requirementsSee what matches and what needs attention

Illustration of the checking steps, not a file result

Local file inspection Real format checks Clear explanations No invented results

From rejected to ready, without the guesswork.

Find out what the website expects, what your file actually contains, and which changes can help.

Choose your file

Start with a photo or document. Your browser reads real file details without uploading the contents.

Tell us the rules

Choose the type of destination and enter its actual file size, format or image dimension limits.

Get a useful answer

See measured facts, compatibility findings and available corrections. Downloads appear only after output verification.

The right tool for the problem.

Check files that are too big, in the wrong format or the wrong dimensions.

Browse all tools

File compatibility checkerCheck measured facts against the upload rules you enter.Reduce a file under 1 MBTry to make a supported file smaller than 1 MiB.JPG to PNGConvert a JPEG image into a validated PNG.HEIC to JPGConvert a readable HEIC image to JPG where browser decoding supports it.Compress PDFRepack a PDF without rasterising text. Not every PDF will become smaller.Merge PDF filesCombine two or more real PDF files into a single validated document.

Processing runs locally in your browser. A download is offered only for output that passes validation; some inputs or size targets cannot be processed.

Whatever you're trying to upload.

Start with the file or problem you have in front of you.

File checks

Find the problem before you change anything.

View tools

Image tools

Get your images into the right shape and format.

View tools

PDF tools

Make document uploads less frustrating.

View tools

Need to get a file ready for an upload? Start with a size check, a format change or the PDF pages you actually need. The tools work in your browser, and your original stays untouched.

Need the rules for a particular website?

Our upload guides explain the awkward bits: the wrong photo format, an attachment that is too large or a portal that wants documents in a different order. Start with the guide for the website you are using, then open the compatibility checker. Where we have verified a technical requirement, the guide brings it into the checker for you.

Still seeing “file not supported”?

Give us the file and the exact limits. We'll show you what can be checked now.

Check my file