Metadata Studio

A workbench for looking at, fixing and comparing the author, company, capture time and location stored in photos, PDFs and Office files. Every edit is re-read and verified, with a before/after diff. To just strip everything, use the dedicated remover tools.

On-device・No upload

Your files and input are processed only inside your browser on this device and are never uploaded to our servers.

Drop files here (multiple allowed)

or

Files are read and written inside your browser only — nothing is uploaded.Accepts: JPEG, PNG, WebP, HEIC, PDF, Word, Excel, PowerPoint (audio / video: name and type only)Up to 100 MB per filePaste (Ctrl+V) also works

What you can do

Add files, then switch modes to view, fix or compare the same files.

  • ViewList what a file carries and highlight items that can identify a person or place.
  • EditRewrite PDF document info and Office author / company fields. Body content is never touched.
  • Fix datesShift JPEG capture times by ± hours in bulk, or set an exact date. Pixel data is left alone.
  • GPSSee where a photo was taken and remove just the GPS. No map is loaded from the web.
  • ComparePut two files’ metadata side by side and see only what differs.
  • CopyCopy or save the items as text or JSON.

How to use

  1. Drop photos, PDFs or Word / Excel / PowerPoint files, or click “Choose files” (several at once). “Try a sample” loads a photo with a location, a docx and a PDF.

  2. Use “View” to see whether EXIF, GPS, XMP, IPTC and ICC are present and what they say. Authors, company names, locations, device serial numbers and local paths are highlighted in yellow.

  3. To fix something, use “Edit” for PDF and Office, “Fix dates” for photo timestamps that are off, and “GPS” for locations. After writing, the file is re-read and verified, and a before/after diff is shown.

  4. In “Compare”, pick two files and only the differing items are listed — handy for checking an edited file against its original.

  5. Download the result (a ZIP plus report.csv for several photos). “Copy” turns the item list into text or JSON.

What it does

Built for looking, fixing and comparing

The existing EXIF & GPS Remover and PDF Metadata Cleaner only delete. Metadata Studio reads what is there, changes just the fields you pick and compares before and after. For wiping everything it points you to those tools.

Date fixing rewrites in place

EXIF dates are fixed 19-character strings, so they are overwritten where they sit — the file length and every other offset stay put. For a wrong time-zone setting you can shift OffsetTime by the same amount so the capture moment in UTC is preserved.

GPS removal reaches the hiding places

The EXIF GPS block is zero-filled and its entry closed up, GPS inside the embedded thumbnail is cleaned, and GPS properties in XMP are blanked. Other EXIF offsets and the thumbnail are left intact.

Re-read and verified after every write

For JPEG, everything outside EXIF / XMP (image data, quantisation tables, ICC, IPTC) is checked to be byte-identical and the file size unchanged. PDF and Office values are read back and compared with what was written.

Personal and location data in yellow

Author, last-modified-by, company, device serial numbers, IPTC place names, local paths (C:\Users\…) and e-mail addresses stand out in the table so you notice them before sharing.

PDF edits keep XMP consistent

Changing only the PDF Info can leave XMP with the old values. You choose to regenerate, remove or keep XMP when editing; the default rebuilds XMP from the new values.

Use cases

  • Shift the capture time of trip photos taken with a camera clock left on UTC by +9 hours, all at once
  • Check and fix the author, company and last-modified-by of a PDF or Word file before sending it to a client
  • Remove only the shooting location from a photo before posting it, keeping everything else
  • Compare a file before and after editing to see exactly which metadata changed
  • Replace a PDF title that is really a file path (C:\Users\…) with a proper title

Supported formats

View

JPEG, PNG, WebP (EXIF, GPS, XMP, IPTC, ICC, PNG text)HEIC, AVIF, TIFF (EXIF and GPS only)PDF (document info, XMP)docx, xlsx, pptx (core.xml, app.xml, custom.xml)Audio / video (name and type only)

Edit

PDF (title, author, subject, keywords, creator, producer, created, modified)docx, xlsx, pptx (title, author, last modified by, created, modified, company)JPEG (EXIF dates and OffsetTime, GPS removal)

Output

Same format and file nameZIP for several files, with report.csvText / JSON metadata listing

Capability matrix

FeatureSupportNotes
Show presence and content of EXIF, GPS, XMP, IPTC and ICC in JPEG, PNG and WebPSupported—
View HEIC, AVIF and TIFFPartialEXIF and GPS only; XMP, IPTC and ICC are not read
Show PDF document info and XMPSupportedPassword-protected PDFs can’t be read
Show core.xml, app.xml and custom.xml of docx, xlsx, pptxSupported—
Highlight personal and location itemsSupportedAuthor, company, GPS, serial numbers, paths, e-mail addresses…
Edit PDF document info (XMP regenerated / removed / kept)SupportedPage content is never changed
Edit Office author, last modified by, title, created / modified and companySupportedOther parts are copied byte for byte
Bulk-fix JPEG EXIF dates (± time, exact date, OffsetTime follow-up)SupportedRewritten in place; pixel data unchanged
Remove only the GPS from a JPEGSupportedAlso inside the thumbnail and in XMP
Re-read after writing and show a before/after diffSupported—
Compare the metadata of two filesSupported—
Copy or save items as text / JSONSupported—
Show the location on a mapPartialNo map is loaded: coordinates plus an “open in a map app” link that contacts the web only when clicked
Fix dates held in XMP or IPTCNot supportedOnly EXIF dates are rewritten (a warning appears when XMP / IPTC carry dates)
Edit images other than JPEG (PNG, WebP, HEIC)Not supportedView only. Use EXIF & GPS Remover or convert to JPEG for locations
Edit EXIF items other than dates and GPS (make, model, artist…)Not supported—
Add a date to a JPEG that has none in EXIFNot supportedOnly existing dates and OffsetTime are rewritten
Audio / video metadata (ID3, MP4 tags…)Not supportedOnly the name and type (MIME) are shown
Legacy .doc / .xls / .ppt and OpenDocument (.odt…)Not supported—
Strip all metadata at onceNot supportedUse the dedicated EXIF & GPS Remover / PDF Metadata Cleaner

Limits & notes

  • Up to 100 MB per file, 100 files and 500 MB in total per batch. Files are processed one at a time in a background thread and can be canceled.
  • Date fixing and GPS removal work on JPEG only. Edited files never overwrite the original; they download as new files under the same name.
  • Date fixing only rewrites EXIF dates and OffsetTime that already exist and never creates new ones. A correction that would leave years 1–9999 is skipped for that field.
  • The operating system’s own modified time cannot be set; downloads get the time of the download.
  • Regenerating PDF XMP drops everything in it other than the document info (edit history etc.).
  • A PDF is rewritten when saved: digital signatures become invalid, and old revisions left by incremental updates (earlier document info etc.) are not carried into the output.
  • GPS in JPEGs embedded after the main JPEG (e.g. motion-photo previews) is removed too, but other embedded data (such as the video part) is not inspected.
  • Office files are repacked, but every part other than docProps stays byte-identical. Password-protected or damaged ZIPs are not handled.
  • What is visible in the picture (signs, faces, documents) and personal data written in the body text are out of scope.

Privacy & safety

Reading, analysing, rewriting and zipping all happen in your browser. Files and locations are never sent to or stored on a server, and no map is loaded. The “open in a map app” links open OpenStreetMap or Google Maps with the coordinates only when you click them; nothing is sent before that.

FAQ

Can I change the date a photo was taken?
For JPEG, yes — use “Fix dates”. It rewrites the EXIF date taken, date digitized and modified date by shifting them or setting an exact date, without touching the image data. A photo with no dates in its EXIF can’t be given new ones.
What is OffsetTime, and when should I choose “shift by the same amount”?
OffsetTime is the EXIF field (e.g. +09:00) saying how far the recorded clock time is from UTC. If the camera’s time zone was set wrong, shifting OffsetTime by the same amount keeps the capture moment in UTC unchanged. If the clock was simply an hour slow, choose “Leave as is”.
Does removing only the GPS change image quality or other data?
No. The EXIF GPS block is removed and any GPS left in the thumbnail or XMP is cleaned, but image data, colour info, capture time and camera details stay. After removal the file is re-read to confirm no GPS remains and that everything outside EXIF / XMP is byte-identical. IPTC place names (city etc.) are not GPS and are kept.
I changed a PDF’s author but Acrobat still shows the old name — why?
A PDF can hold the same information twice, in the document info (Info) and in XMP, and Acrobat prefers XMP. When editing you can regenerate XMP from the new values (default) or remove it. Choosing “Leave it as is” can keep showing the old values.
Will changing a Word file’s author or company damage the document?
No. Only docProps/core.xml and app.xml inside the ZIP are rewritten; the text, images and styles are copied with their original compressed bytes, and the written values are read back and checked. Names that live in comments or tracked changes are body content, not metadata, so they are not changed here.
Why can’t I see the location on a map?
Showing a map means loading map tiles from the web, which tells a map service where the photo was taken. This tool shows latitude, longitude and degrees/minutes/seconds, and opens an external map only when you click the link.

Universal File Inspector

Drop any file to see its real format (from the content), its structure and metadata, what to watch out for, and which tools can process it — before opening it, or before sending it to someone.

Extract Anything

Open a file and get its text, images, tables, URLs / e-mail / phone numbers, QR codes and barcodes, attachments and metadata, each with a count and the place it came from (file, page, sheet). What could not be extracted is explained. OCR is not supported.

Archive Studio — ZIP, TAR & tar.gz Viewer, Extractor & Creator

Drop a ZIP, TAR, tar.gz or gz to list what is inside — including ZIPs made on Japanese Windows whose file names are normally garbled. Extract safely, re-create a ZIP with UTF-8 names, or build a ZIP / tar.gz from folders. Everything runs on your device.

Batch Rename

Combine rules to rename files in bulk. Check old → new names live, catch duplicates and invalid names, then save renamed copies as a ZIP or into a folder. Files are never uploaded.

Duplicate Files

Load a whole folder and see groups of files whose content is byte-for-byte identical, with the space they waste. Nothing is uploaded and nothing is deleted: save the keep/duplicate verdicts as CSV or JSON and clean up with your own file manager.

File Hash — Checksum Calculator & Verifier

Drop a file to get its SHA-256 (and more); paste the published hash to see match or mismatch instantly. Even multi-gigabyte ISOs are read in chunks on your own device — nothing is uploaded.

Last updated: