What is Image Metadata?
Image metadata is hidden information embedded within a photo file. This data is created by digital cameras and smartphones to provide technical context about the image. While useful for professional photographers, it often contains sensitive personal information that you may not want to share publicly on social media or websites.
EXIF Data
EXIF (Exchangeable Image File Format) is the most common form of metadata. It includes details such as:
- Camera model and manufacturer
- Lens settings (aperture, focal length, ISO)
- Date and exact time the photo was taken
- Software used for editing
GPS & Location Metadata
Most modern smartphones embed precise GPS coordinates into the metadata of every photo you take. When you upload these photos to the internet, anyone who downloads the file can potentially see exactly where you were—whether it's your home, your child's school, or your workplace.
Why Remove Metadata Before Sharing?
Removing metadata is a key step in protecting your digital privacy. By stripping this information, you ensure that:
- Identity Protection: Your device's unique serial numbers and camera details are removed.
- Physical Safety: Your location history is not leaked through embedded GPS tags.
- Smaller Files: While metadata is small, stripping it can slightly reduce the overall file size of the image.
How Local Browser Metadata Removal Works
ConvertUnlimited uses a "destructive re-encoding" method to remove metadata. When an image is added, the tool draws it onto an HTML5 Canvas. This process only captures the raw pixel data — no EXIF, IPTC, XMP, or ICC-profile bytes are read into the canvas at all. When the image is exported back to a file with canvas.toBlob(), the browser writes a fresh file containing only the pixels and the minimal headers its own encoder produces for that format. Because the removal happens by rebuilding the file from pixels rather than deleting specific tags, it works the same way for JPG, PNG, and WebP source files, and it also discards metadata types the tool's own preview does not show.
Note: Because the pixels are re-encoded, file size can change slightly even at the same dimensions, and any embedded color profile (for example, Display P3 or Adobe RGB) is not carried over — the browser's default encoder writes standard sRGB, which can shift colors very slightly on wide-gamut source photos. JPG and WebP outputs are written at a fixed 95% quality; PNG output is lossless.
What the privacy check shows — and what it misses
The privacy check and the actual cleanup have different coverage. The check is a purpose-built parser for the JPEG APP1/EXIF segment. It surfaces GPS, camera, capture time, artist, copyright, software, image description, and selected camera settings. It does not parse IPTC, XMP, embedded thumbnails, or metadata containers in PNG and WebP. The risk label is therefore an explanation of supported fields found, not a forensic certification.
| EXIF field | Shown in preview? | Typical sensitivity |
| GPS latitude / longitude | Yes | High — exact location where the photo was taken |
| Camera make and model | Yes | Low to medium — device identification |
| Date/time taken | Yes | Medium — when the photo was taken |
| Lens, ISO, aperture, shutter speed | Selected fields | Low — technical detail only |
| Software / editing history tag | Yes, when stored in readable EXIF | Low |
| Embedded thumbnail image | No | Medium — can retain content from before a later crop or edit ("thumbnail mismatch") |
| Artist / copyright / user comment | No | Medium — can contain a name |
| ICC color profile | No | None — color data only, not personal |
| IPTC / XMP caption, keywords, author | No | Medium — varies by how the file was tagged |
The strip operation itself is not limited this way: because it rebuilds the file from decoded pixels rather than editing specific tags, running “Strip & Verify” discards the source metadata containers. The tool then scans the cleaned output again and reports whether any supported readable EXIF fields remain.
Batch Metadata Removal
Add multiple photos at once to clean a whole batch in one pass. Selected image contents are processed locally in your browser for this workflow; ConvertUnlimited does not provide a server-side upload endpoint for it.
Failure modes and limits
- Unsupported formats. Only JPG, PNG, and WebP are accepted; HEIC, TIFF, RAW, and PDF files are rejected outright.
- Very large batches. Each file is read and re-encoded through the browser's canvas; dozens of very large photos at once can use significant memory and slow the tab.
- Color-managed photos. Wide-gamut images (Display P3, Adobe RGB) can show a very slight color shift after cleaning, since the canvas re-encode does not carry the original ICC profile forward.
- PNG and WebP metadata detection. The visible "Found in this photo" summary never reports content for PNG or WebP sources, even though the strip operation still runs correctly on those formats.
Frequently Asked Questions
Is this tool safe for sensitive photos?
Selected image contents are processed locally in your browser for supported metadata cleanup workflows. ConvertUnlimited does not provide a server-side upload endpoint for this processing flow. See local processing and limitations.
Does it support PNG and WebP?
Yes, for the actual removal. Metadata is most common in JPEGs, but PNG and WebP files can also carry EXIF or XMP data. The canvas re-encode discards it for all three supported formats, even though the visible metadata preview only reports fields it found in a JPEG.
Will my images lose quality?
JPG and WebP outputs are re-encoded at a fixed 95% quality, and PNG output is lossless, so visual clarity should stay close to the original at normal viewing sizes. Re-encoding also strips any embedded color profile, which can cause a very slight color shift on wide-gamut photos.
Does the metadata preview show everything the file contains?
No. It parses selected fields from a JPEG's EXIF segment: GPS, camera make/model, capture date, artist, copyright, software, description, and selected camera settings. Embedded thumbnails, IPTC, XMP, and metadata containers in PNG or WebP are not inspected. A low-risk result means no supported readable fields were detected; it is not a forensic guarantee.
Does removal still work on fields the preview doesn't show?
Yes. The strip operation rebuilds the file from decoded pixels rather than deleting individual tags, so it discards every metadata type in the file, including an embedded thumbnail that might still show an older version of the photo, not just the GPS, camera, and date fields the preview surfaces.
What file types are supported?
JPG, PNG, and WebP. HEIC, TIFF, RAW camera formats, and PDF files are not accepted by this tool.
Can I clean many photos at once?
Yes, add multiple files and process them together, then download individually or as a ZIP archive. Very large batches of high-resolution photos can use significant browser memory.