See what is hidden inside a file, and remove it
Every file says more about itself than its contents do. This reads the lot — one box, any format — and where the data can be cut out without re-encoding, a button does it.
- Runs entirely in your browser
- Works offline
- No upload
- No sign-up
- No watermark
Loading the tool…
How it works
- Drop any file. The type is read from the first bytes, so a renamed extension does not fool it.
- Read what came out, grouped: the file itself, camera or device, dates, location, software and editing history, people and company, traceable identifiers.
- Press the clean button. The tool lists what the copy loses and what cannot be removed without re-encoding.
Why nothing is uploaded
Every operation on this page is done by code running inside your browser tab, using the same engine that renders web pages. The file is read from disk into your tab’s memory, transformed there, and written back out as a download. It is never sent anywhere — not to us, not to a third party.
Verify it yourself
- Open your browser’s developer tools (F12) and select the Network tab.
- Load your file and run the tool.
- The only requests you will see fetch the tool’s own code — and, for a few heavy tools, their open-source engine from a public CDN — plus one small page-view ping to loreatec.jp (page address and title, nothing more). None of them carry your file.
Frequently asked questions
Which formats can actually be cleaned?
JPEG, PNG, WebP, GIF, HEIC and SVG images; MP4, MOV and Matroska (WebM/MKV) video; MP3, WAV, FLAC and M4A audio; PDF; and Word, Excel, PowerPoint and OpenDocument files. TIFF, camera raw, Ogg and AVI are read but not cleaned: in those the metadata is bound into the structure, and cutting it out means rebuilding the file. The tool shows which case applies to your file.
Does cleaning change the picture or the sound?
No. Nothing is re-encoded. The image and audio data are copied byte for byte and only the metadata sections are cut out or overwritten. In an MP4 the metadata boxes are replaced by free space of the same size, so not a single byte of video moves.
What cannot be removed?
The encoder’s own signature inside the compressed stream — x264 and LAME write their version there — and things like a JPEG’s compression tables, which differ between makers and narrow down what produced the file. Reaching those means re-encoding, which costs quality. Tracked changes and comments in a Word file are also left alone: they are content, not metadata, and removing them would change the document. Accept or reject them in Word before sending.
How worried should I be about the location in a photo?
A phone stores the exact spot unless told otherwise, and everyone you send the file to can read it. For a holiday photo it rarely matters; for a picture of your home, a client’s site, or anything posted publicly, it is the most sensitive field in the file. It is flagged clearly whenever it is found, with the coordinates.
Why does it ignore the file extension?
Because anyone can rename a file. The type is decided by the first bytes — the magic number every format starts with. When the name and the bytes disagree, that is shown too, and it is often the more interesting fact.
Is the file uploaded?
No. You are usually here because a file might say more than it should, and analysing that on someone else’s server would defeat the purpose. Reading and cleaning both happen in this tab, and the clean copy is built on your device.