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Image Info

Image

Read format, dimensions, bit depth, and alpha channel from image file bytes: no decoding required

Drop in a PNG, JPEG, GIF, WebP, or BMP file and get its dimensions, format, bit depth, and (where the format supports it) alpha channel presence back immediately, useful for confirming an image's real pixel dimensions before wiring it into a `srcset` or checking whether it actually has transparency before using it as a CSS background. This reads only the file's header bytes directly, the same structural data a browser reads to know how to decode the image, rather than actually decoding and rendering the pixels, so it stays fast even on a large file and can report dimensions from an image whose pixel data is otherwise corrupted. It doesn't read EXIF metadata like camera settings or GPS location; that's a separate concern a dedicated EXIF viewer handles.

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How to use Image Info

  • 1.Drop a PNG, JPEG, GIF, or WebP file to instantly see its dimensions, format, and bit depth without opening it in an image editor.
  • 2.Check whether an uploaded image has an alpha channel before using it as a CSS background or compositing it over other content.
  • 3.Quickly verify the actual pixel dimensions of an asset a designer handed off, before wiring it into responsive `srcset` markup.

Frequently asked questions

Does this decode or render the actual image?
No — it reads metadata directly from the file's header bytes (like PNG IHDR chunks or JPEG SOF markers), so it works even on corrupted image data as long as the header is intact.
Is my image uploaded to a server?
No, the file is read and parsed entirely in your browser using the File API — nothing leaves your machine.
What formats are supported?
Common web formats — PNG, JPEG, GIF, WebP, and BMP — are supported; more obscure or proprietary formats may not parse correctly.
Can it tell me the EXIF data too?
No, this tool focuses on core format/dimension/bit-depth info, not EXIF metadata like camera settings or GPS location — use a dedicated EXIF viewer for that.

Use via API, SDK, or MCP

cURL# Free: 1,000 req/day · Pro: 10,000 req/day
curl -X POST https://api.utilix.tech/v1/tools/image-info \
  -H "Authorization: Bearer utx_live_..." \
  -F "file=@photo.png"

Get an API key from your dashboard · Full API docs →

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