Check an image file
Inspect PNG, JPG/JPEG, GIF, WebP, BMP, and TIFF structure, dimensions, frames, transparency clues, truncation, and extension mismatches — directly in your browser.
Analyzing your file...
Checking the file structure.
ARADURU is checking this file.
Waiting for the diagnosis.
Wait for the browser-side check to finish.
Building your troubleshooting path.
Waiting for the problem context.
Waiting for the file check.
Waiting for the next step.
WHY ARADURU SAYS THIS
Review file evidence and details
File facts, recovery guidance, and technical checks stay here until you need them.
Show details
Your file at a glance
ARADURU will suggest the safest next action after the file check finishes.
File identity evidence
Technical details View file checks
Image won't open, preview, or upload correctly?
Start with the file itself. ARADURU checks image-container structure and useful metadata before you assume the problem is the app, website, or filename.
Image checks that go beyond the extension
The Image File Doctor uses format-specific structure instead of trusting the filename alone. The exact checks depend on the image format detected.
File signature and container structure
Confirm PNG, JPEG, GIF, or WebP identity and inspect required structural records and boundaries.
Dimensions and image profile
Read width, height, image variant, frame count, and transparency clues when the format exposes them safely.
Incomplete or truncated image data
Look for missing IEND/EOI/trailer records, malformed GIF blocks, or inconsistent WebP RIFF boundaries.
Incorrect filename extension
When the contents identify a different image format, ARADURU can explain the mismatch and offer a safely renamed local copy.
Deep checks for six common image families
These checks inspect file structure and metadata. They do not decode every pixel, prove visual quality, or guarantee support in every application.
PNG / APNG clues
Signature, IHDR dimensions, IDAT presence, chunk boundaries, IEND, transparency, and APNG frame declarations.
JPEG
SOI, frame dimensions, scan marker, segment boundaries, EOI, and baseline/progressive profile.
GIF87a / GIF89a
Logical-screen size, block framing, frame count, transparency flag, and the final GIF trailer.
WebP
RIFF size, chunk boundaries, VP8/VP8L/VP8X dimensions, payload presence, animation, and transparency clues.
Windows Bitmap
BM signature, DIB header, dimensions, bit depth, declared file size, pixel-data offset, and expected pixel-data boundaries.
TIFF / BigTIFF
Byte order, TIFF/BigTIFF header, image-directory chain, dimensions, sample profile, compression, and referenced image-data ranges.
Structure health is not the same as perfect rendering.
A structurally readable image can still have visual defects, unsupported color behavior, application-specific rendering differences, or destination-specific restrictions.
- Keep the original. Test renamed or repaired copies separately.
- Check visual rendering. Open the image in a trusted viewer or editor when pixels matter.
- Use Compatibility Check. Review file-side portability evidence for opening, sharing, or uploading.
- Use Upload Check. Compare the image with a website’s exact size, type, and filename rules.