Detect the format and type of any image. See dimensions, size, and color depth.
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Configure and use this tool in the full app.
More about the Image Format Detector
A file renamed from .png to .jpg doesn't actually become a JPEG just because the extension changed, the real format lives in the file's own binary signature at the very start of its content, and software that trusts the extension rather than checking that signature is exactly how a mismatched file ends up throwing a confusing, unhelpful "can't open this file" error. This tool detects an image's actual format by reading its binary signature directly, along with its real dimensions, size, and color depth, rather than trusting whatever the file extension happens to claim. Useful for figuring out a file's true format when its extension doesn't seem to match how it actually behaves, catching a mismatched extension before it causes an unexplained error somewhere else, or checking an image's actual color depth and dimensions without opening it in a full editor first.
Detect the format and type of any image. See dimensions, size, and color depth. The Image Format Detector is one of 900+ free developer tools on Toolblip - all open to use without a signup.
How do I use the Image Format Detector?
Open the Image Format Detector on this page, paste or upload your input, and the result updates as you type. Use the copy button to grab the output, or adjust options to tune the result. Nothing you enter leaves your browser.
Is the Image Format Detector free to use?
Yes. The Image Format Detector is a free online tool on Toolblip - no signup, no account, no hidden usage limits. It runs in your browser and works on desktop and mobile.
Is the Image Format Detector safe and private?
Yes. The Image Format Detector processes your data entirely client-side, so nothing you paste is uploaded or stored on any server. It's safe to use with internal snippets, private keys for debugging, or any other sensitive content you'd rather not send to a remote service.
What kind of output does the Image Format Detector produce?
The Image Format Detector produces clean, formatted output that you can copy or download with a single click. The output is tailored to the tool's purpose — formatted code, converted data, transformed text, or processed media — and is ready for immediate use in your project or workflow.
Does the Image Format Detector work on mobile devices?
Yes. The Image Format Detector is designed to work on any device with a modern browser, including phones and tablets. The interface adapts to smaller screens, and the core functionality — paste input, transform, copy output — works the same way regardless of your device.
Does the Image Format Detector preserve my image's original quality?
Whenever an operation is lossless - renaming, metadata stripping, format conversion to a lossless codec - the Image Format Detector preserves the original bytes. Operations that resample the image (resizing, compressing to JPEG/WebP) will re-encode, but you control the quality setting, and nothing is uploaded.
Does the Image Format Detector preserve the original quality of my images?
The Image Format Detector preserves original quality for lossless operations like resizing down or converting between lossless formats. For operations that re-encode the image (JPEG compression, format conversion to lossy codecs), you control the quality setting to balance file size against visual fidelity.
Can I use the Image Format Detector offline?
Once the page has loaded, the Image Format Detector continues to work without an internet connection. Bookmark this page and return to it anytime - all logic runs locally.