Blog

Guides sur les métadonnées et les formats de fichiers

Learn how to check file metadata online, which fields matter first, and how to decide whether a file is ready to share.

Learn what file metadata is, where it shows up, and why it matters before you share a file.

Learn what EXIF data is, which fields matter most, and why it matters for image privacy.

Learn how to find GPS metadata in a photo, remove it from an image, and verify the cleaned copy before you share it.

Learn which metadata fields make sense to edit online, when editing is better than removal, and how to verify the result.

Learn which document metadata fields matter most, how to review them quickly, and why PDFs are usually the easiest place to start online.

Learn how to use an online PDF parser to review document properties, page count, and text signals before sharing a file.

Learn what a file signature is, how it differs from an extension, and why it helps confirm the real format of a file.

Learn what a MIME type is, where it appears, and why it matters when a file is uploaded, downloaded, or previewed online.

Learn how to compare two PDFs online using page count, document properties, and text behavior.

Learn how to compare image metadata online so you can confirm what changed between two copies of the same image.

Learn how to read video metadata, which fields matter most in everyday use, and what online tools can realistically confirm.

Learn what an online video stream inspector can show, what it cannot confirm, and how to use it as a fast check before sharing or comparing a file.

Learn how to review a PDF before cleanup so you can tell whether the file is mostly text, mostly images, or a mix of both.

Learn how to compare two videos online using duration, size, dimensions, and other practical checks that reveal mismatches quickly.

Learn how metadata removal works across different file types, which formats are a good fit for online cleanup, and how to verify the result.

Learn how to remove EXIF data from a photo online, which fields to check first, and how to verify the cleaned image before sharing.

Learn how to check if a photo has GPS data, which location fields matter, and what to do before sharing the image.

Learn how to remove author from PDF online, check document-info fields, and verify that the exported PDF no longer exposes the old author.

Learn how to check file type by signature, compare it with the extension and MIME type, and understand what a mismatch means.

Learn why a photo shows location data, how to check GPS metadata, and how to remove location fields before sharing the image.

Learn why a PDF shows your name as author, where the author field comes from, and how to remove or verify PDF metadata.

Learn why a file type looks wrong, how extension, MIME type, and file signature can disagree, and how to troubleshoot upload errors.