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File Analyzer

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Drop any file to see its type, size, dimensions, metadata and hash, and what to do next

Processed in your browser. Nothing is uploaded. Updated on 24 Oct 2026.

A file analyzer that reads the first 64 KB of a file on your device and reports its name, extension, MIME type, size, magic number, dimensions, metadata, SHA-256 and MD5, so a wrong extension shows at once. Underneath, every Omnikit tool that accepts that exact file is listed. Nothing is uploaded.

Next:
  • Bulk File Renamer Rename many files at once: remove timestamps, renumber clips in order, add numbers
  • Folder & ZIP Sorter Keep only the videos, images or audio from a ZIP or folder, renamed if you like

How to analyze a file without uploading it

1

Press Select a file, or drop any file onto the page; it is read on your device.

2

Read the one-line answer at the top, then the File signature, MIME type, File size and Dimensions below it.

3

Press Copy beside SHA-256 or MD5 once the hashes finish, to compare against a published digest.

4

Under What you can do with this file, press a tool to open the file in it.

About the File Analyzer

The File Analyzer exists because a site with a hundred and forty tools and no way in is harder to use than one with ten. Rather than asking you to guess which tool you want, it asks for the file and works backwards from it.

What it establishes, and how. The name and the extension come from your device. The format comes from the file's own opening bytes, matched against the signature table every format on this site is described by, which is why a JPEG named photo.png is reported as a JPEG. The MIME type follows from that verdict, with your browser's own claim shown beside it whenever the two disagree. The size is given both as a human figure and as an exact byte count, because upload portals count bytes. The magic number is printed in hex and as characters, with the offset it sits at. Dimensions are read out of the header for PNG, JPEG, GIF, BMP, WebP, TIFF, ICO, SVG, HEIC and AVIF, without ever decoding the picture, so a forty-megapixel photo is measured instantly. Metadata means EXIF, XMP, IPTC and embedded text, including the GPS position a phone writes into a photo. The hashes are SHA-256 and MD5, computed over every byte.

Anything that cannot be established is said in a sentence rather than left blank. A zip has no dimensions. A stripped JPEG has no metadata. A CSV has no magic number, because text formats do not have one. A file nobody recognises has no honest MIME type at all.

Then the question the whole page is for: what can be done with this file. That list is not written down anywhere. It is worked out from the registry every time the page loads, by reading what each tool says it takes, so a tool added next month appears here on its own.

Nothing is uploaded. The first 64 KB are read to recognise the file, the last few to see whether a PDF is locked, and the hash is taken in four-megabyte slices so a multi-gigabyte file never has to sit in memory at once.

Frequently asked questions

How do I find out what a file is when it has no extension?

Drop the file on this page. Almost every binary format writes a fixed run of bytes at its start, so a PNG, a PDF, a zip or an MP4 is recognised from its contents whatever the file happens to be called. The verdict, the signature bytes behind it and the offset they sit at are all shown.

Why does a website say my PNG is not a PNG?

Renaming a file changes its label and nothing else. A photo saved as JPEG and later renamed to .png is still a JPEG inside, and any portal that checks properly will reject it. The analyzer reads the bytes, says which format they really are, and offers the converter that would make the name true.

Is my file uploaded to be analysed?

No. The first 64 KB are read in your own browser to recognise the format and measure the picture, the last 4 KB to see whether a PDF is locked, and the hash is computed slice by slice on your device. Nothing reaches a server, so there is nothing for anyone to delete afterwards.

Can it show the dimensions of a photo without opening it?

Yes, for PNG, JPEG, GIF, BMP, WebP, TIFF, ICO, SVG, HEIC and AVIF. Each of those writes its width and height into the header, so the number is read directly from the first bytes rather than by decoding the image. A 40-megapixel photo is therefore measured as fast as a thumbnail.

What does the file signature or magic number actually tell me?

Those bytes are how software recognises a format without trusting the filename. A PNG begins 89 50 4E 47, a PDF begins %PDF, a zip begins PK. Seeing them in hex proves what the file is, which matters when an upload keeps failing or when a download does not open in the program it should.

How does the list of things I can do with the file stay correct?

Every tool on this site declares in one registry what kind of file it takes. The list is built from that registry each time the page loads, not from a table somebody maintains, so a tool added later appears for the right files immediately and a tool that is removed stops being offered.

Kya yeh bata sakta hai ki file ka type kaise pata kare bina software ke?

Haan. File ka type kaise pata kare ka seedha jawab yahi page hai: file daaliye aur uske pehle bytes browser mein hi padhe jaate hain. Koi software install nahi karna padta, file upload nahi hoti, aur format, size, dimensions aur hash sab ek saath dikh jaate hain.

Does it tell me whether a photo shows where it was taken?

Yes. EXIF, XMP, IPTC and embedded text are read from JPEG, PNG and WebP files, and a GPS position is listed with a warning beside it. Files above 64 MB are left alone and the page says so, because walking a very large file for metadata would freeze the tab.

Still stuck? Ask about File Analyzer and anybody who knows can answer. No account needed.

Common uses

  • Fake File Extension CheckerSpot a file whose extension lies, such as an .exe renamed to .pdf or a .zip named .jpg
  • File Type CheckerCheck what a file really is from its bytes, not from the name it was given
  • File Ka Type Kaise Pata KareFile ka asli type, size aur hash dekhe, bina upload kiye, browser mein hi

Same job, other tools: Separate Photos and Videos – Split a folder or ZIP into its photos and its videos.

On the related tools: HAR Sanitizer – Remove cookies, Authorization headers and tokens from a HAR before sending it to support.

Also works as: File Signature Checker · Magic Number Checker.

Related tools

All file tools
Bulk File RenamerRename many files at once: remove timestamps, renumber clips in order, add numbersFolder & ZIP SorterKeep only the videos, images or audio from a ZIP or folder, renamed if you likeHAR File ViewerOpen a .har network export: requests, sizes, slow and failed calls, a copy without secretsCompress ImageShrink JPG, PNG and WebP with a live before and after previewImage to PDFTurn photos into a PDF, one per page or several per pageMerge PDFCombine PDFs and reorder pages by dragging, all on your deviceCompress PDFMake a scanned or photo-heavy PDF smaller, with text kept selectablePDF to WordGet an editable Word document from a PDF, without uploading it

In the collection File Converter.

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