KillMetadataOpen cleaner

AVIF METADATA REMOVER

Remove supported metadata from an AVIF image

AVIF stores AV1-coded image data inside an item-based media container that may also contain Exif, XMP, descriptive names and thumbnails. KillMetadata validates and rewrites supported container metadata while preserving the coded image bytes.

Choose a file See what changes

THE CLEANING PLAN

Remove what exposes you. Keep what makes the file work.

Every field is shown before the rewrite and classified by action and coverage.

Remove
  • Supported Exif camera, GPS and date records
  • XMP items and XML metadata boxes
  • Descriptive item and handler names
  • Referenced thumbnail items and supported provenance after confirmation
Preserve
  • Coded AV1 image bytes with a verified digest
  • Orientation and required image properties
  • Color, geometry and AV1 codec configuration
  • The untouched source file
Outside this guarantee
  • Metadata units embedded inside the AV1 bitstream
  • Image sequences, derived images and protected variants
  • Unknown or structurally ambiguous item data
  • Visible personal information in image pixels

WHY THE ENGINE MATTERS

AVIF container cleanup does not cover the AV1 bitstream

The handler validates item locations, references, property associations and extents before neutralizing supported metadata items. The retained coded image digest is compared in a fresh verifier worker.

AV1 codec-level metadata units are not parsed, so every cleaned AVIF output remains partial. This explicit limit prevents a container-only success from being misrepresented as a complete metadata guarantee.

Explore the complete verification methodology →

BEFORE YOU SHARE

A four-step privacy check.

Metadata cleaning is one part of a safe sharing workflow.

  1. 01Confirm AVIF was detected from its bytes
  2. 02Review supported and unknown container carriers
  3. 03Create the clean copy without recompression
  4. 04Read and acknowledge the mandatory partial result before saving

QUESTIONS, ANSWERED

Know the boundary before you clean.

No vague “100% clean” claim.

Are my files uploaded?

No. The cleaner runs in your browser, has no upload endpoint, and only enables the file picker after its processor assets are available locally.

Is the original file changed?

No. KillMetadata reads the original and creates a separately named cleaned copy. It never overwrites the source file.

Does AVIF cleaning reduce image quality?

The AV1 coded image items are copied rather than re-encoded, and their combined SHA-256 digest is checked after the rewrite.

Why can AVIF never show verified-clean here?

The container is checked and supported metadata is removed, but embedded AV1 codec metadata units remain outside this build’s parser coverage. The honest result is therefore partial.

RELATED GUIDES

Keep checking the file, not just its name.

PHOTO METADATA REMOVERRemove metadata from photosRemove supported EXIF, GPS, camera, date, IPTC and XMP metadata from photos locally while preserving orientation and image quality.IMAGE METADATA REMOVERRemove metadata from an imageRemove supported EXIF, GPS, camera, author and date metadata from JPG, PNG, WebP, GIF, TIFF, HEIC and AVIF images locally.HEIC + HEIF METADATA REMOVERRemove supported metadata from a HEIC photoRemove supported Exif, XMP, names and thumbnails from HEIC and HEIF photos locally; every cleaned result is clearly reported as partial.TIFF METADATA REMOVERRemove metadata from a TIFF imageRemove supported EXIF, GPS, camera, XMP and IPTC metadata from TIFF, TIF and BigTIFF images locally without recompressing image data.HONEST LIMITSWhat metadata removal cannot promiseUnderstand the boundaries of metadata cleanup, including visible content, hidden document content, signatures, encryption and filesystem attributes.
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