Metadata removal as the browser tools ran

Format

jpeg

Bytes

1156

SHA-256

b889bddf6676162b9f3d9013907cef8b670abbca3976f69ae7f280167e1a67e9

Licence

CC0-1.0

Source

tests/fixtures/media-corpus manifest MC-IMG-001, constructed by scripts/generate-media-corpus.mjs. CC0-1.0 constructed original. Not regenerated by this capture.

Original fixture assets/metadata-removal/metadata-jpeg-gps-orientation-icc-input.jpg

Actions used

• opened /
• uploaded mc-img-jpeg-eiffel-gps-ori-icc.jpg
• clicked #sanitizeBtn
• clicked #filesBtn
• saved download metadata-jpeg-gps-orientation-icc-input_cleaned.jpg

Options recorded

rowState

ready

Recorded input

sha256

b889bddf6676162b9f3d9013907cef8b670abbca3976f69ae7f280167e1a67e9

bytes

1156

image

{"width":48,"height":32,"hasAlpha":false,"gpsPresent":true,"iccPresent":true,"exifPresent":true,"orientation":6,"iccBytes":480,"iccSha256":"c56e1685d888f5edb92fe07f2750f387f8fe8e91b32ff8fb0b56bfbbb9458353"}

hasText

true

Output probe

image

{"width":32,"height":48,"hasAlpha":false,"gpsPresent":false,"iccPresent":true,"exifPresent":false,"orientation":null,"iccBytes":456,"iccSha256":"12afb4d9953adee0607d347daee5b78b18d6b3cab2d572b88970703f5edb37bc"}

8044ff7590c37c1e55d6a30e740da845485fe58cdbf230a6a20b4963e98799a9 · 771

Recorded checks

summary

Independent decode of the cleaned JPEG found no GPS IFD and no EXIF segment. An ICC profile is still present. Input ICC is 480 bytes c56e1685d888f5edb92fe07f2750f387f8fe8e91b32ff8fb0b56bfbbb9458353. Output ICC is 456 bytes 12afb4d9953adee0607d347daee5b78b18d6b3cab2d572b88970703f5edb37bc. Stored input pixels were 48x32 orientation 6. Cleaned pixels were 32x48 orientation none.

publicClaims

[]

image

{"width":32,"height":48,"hasAlpha":false,"gpsPresent":false,"iccPresent":true,"exifPresent":false,"orientation":null,"iccBytes":456,"iccSha256":"12afb4d9953adee0607d347daee5b78b18d6b3cab2d572b88970703f5edb37bc"}

inputIcc

{"sha256":"c56e1685d888f5edb92fe07f2750f387f8fe8e91b32ff8fb0b56bfbbb9458353","bytes":480}

outputIcc

{"sha256":"12afb4d9953adee0607d347daee5b78b18d6b3cab2d572b88970703f5edb37bc","bytes":456}

expectedAbsentStrings

["Synthetic public landmark fixture"]

observedStates

[{"t":1790925431332,"phase":"","rowState":"","busy":false,"progress":""},{"t":1790925431383,"phase":"","rowState":"queued","busy":false,"progress":""},{"t":1790925431564,"phase":"","rowState":"sanitizing","busy":false,"progress":""},{"t":1790925431605,"phase":"","rowState":"ready","busy":false,"progress":""},{"t":1790925431910,"phase":"","rowState":"ready","busy":false,"progress":""}]

blockedExistingTelemetry

[{"method":"GET","host":"static.cloudflareinsights.com","pathname":"/beacon.min.js/v31edd6df95cf4e85bb4c19e7a9bdbcba1788362987495","reason":"cloudflare-insights-beacon"}]

privacy

{"observedUnique":19,"violations":[],"scope":"Observed requests in this run only. Not a universal no-exfiltration certificate."}

pageErrorCount

0

Limitations recorded for this case

• No processing screenshot was published. After the shutter the UI state was: ready. An unpublished attempt was kept at assets/_shutter-attempts/metadata-jpeg-gps-orientation-icc-processing.webp. That file is not a processing screenshot.
• GPS and EXIF are absent on this download. The output ICC profile is present. Its SHA-256 differs from the input profile. This case is partial.
• Cleaned pixel grid is 32x48 and the stored input grid is 48x32 on this file.
• Capture instrumentation aborts known preexisting Cloudflare telemetry at static.cloudflareinsights.com and /cdn-cgi/rum before transmission. That block is not evidence that production has no analytics.

Screenshots from the capture

Format

png

Bytes

179

SHA-256

6e1252437343f693844a6b9900d13fc7fc128c8b572bcbb4ff9443a2ccd6de6f

Licence

CC0-1.0

Source

tests/fixtures/media-corpus manifest MC-IMG-002, constructed by scripts/generate-media-corpus.mjs. CC0-1.0 constructed original. Not regenerated by this capture.

Original fixture assets/metadata-removal/metadata-png-alpha-text-input.png

Actions used

• opened /
• uploaded mc-img-png-alpha-text.png
• clicked #sanitizeBtn
• clicked #filesBtn
• saved download metadata-png-alpha-text-input_cleaned.png

Options recorded

rowState

ready

Recorded input

sha256

6e1252437343f693844a6b9900d13fc7fc128c8b572bcbb4ff9443a2ccd6de6f

bytes

179

image

{"width":32,"height":24,"hasAlpha":true,"gpsPresent":false,"iccPresent":false,"exifPresent":false,"orientation":null,"iccBytes":0,"iccSha256":""}

Output probe

image

{"width":32,"height":24,"hasAlpha":true,"gpsPresent":false,"iccPresent":false,"exifPresent":false,"orientation":null,"iccBytes":0,"iccSha256":""}

8a89c0bb3d3097c2de963b6233346f248e2f47522089c1ff969e6126e381daa6 · 127

Recorded checks

summary

The description text is absent from the cleaned png. Alpha is still present. Dimensions are 32x24.

publicClaims

[]

image

{"width":32,"height":24,"hasAlpha":true,"gpsPresent":false,"iccPresent":false,"exifPresent":false,"orientation":null,"iccBytes":0,"iccSha256":""}

requireAlpha

true

expectedAbsentStrings

["Synthetic alpha channel fixture"]

observedStates

[{"t":1790925432850,"phase":"","rowState":"","busy":false,"progress":""},{"t":1790925432896,"phase":"","rowState":"queued","busy":false,"progress":""},{"t":1790925433084,"phase":"","rowState":"ready","busy":false,"progress":""},{"t":1790925433393,"phase":"","rowState":"ready","busy":false,"progress":""}]

blockedExistingTelemetry

[{"method":"GET","host":"static.cloudflareinsights.com","pathname":"/beacon.min.js/v31edd6df95cf4e85bb4c19e7a9bdbcba1788362987495","reason":"cloudflare-insights-beacon"}]

privacy

{"observedUnique":18,"violations":[],"scope":"Observed requests in this run only. Not a universal no-exfiltration certificate."}

pageErrorCount

0

Limitations recorded for this case

• No processing screenshot was published. After the shutter the UI state was: ready. An unpublished attempt was kept at assets/_shutter-attempts/metadata-png-alpha-text-processing.webp. That file is not a processing screenshot.
• Capture instrumentation aborts known preexisting Cloudflare telemetry at static.cloudflareinsights.com and /cdn-cgi/rum before transmission. That block is not evidence that production has no analytics.

Screenshots from the capture

Format

webp

Bytes

820

SHA-256

6ecee762909f899e24f5d6b2231e9967b1545cccc0f3622e37b8fa8b35466dca

Licence

CC0-1.0

Source

tests/fixtures/media-corpus manifest MC-IMG-003, constructed by scripts/generate-media-corpus.mjs. CC0-1.0 constructed original. Not regenerated by this capture.

Original fixture assets/metadata-removal/metadata-webp-alpha-exif-input.webp

Actions used

• opened /
• uploaded mc-img-webp-alpha-exif.webp
• clicked #sanitizeBtn
• clicked #filesBtn
• saved download metadata-webp-alpha-exif-input_cleaned.webp

Options recorded

rowState

ready

Recorded input

sha256

6ecee762909f899e24f5d6b2231e9967b1545cccc0f3622e37b8fa8b35466dca

bytes

820

image

{"width":32,"height":24,"hasAlpha":true,"gpsPresent":false,"iccPresent":true,"exifPresent":true,"orientation":1,"iccBytes":480,"iccSha256":"c56e1685d888f5edb92fe07f2750f387f8fe8e91b32ff8fb0b56bfbbb9458353"}

Output probe

image

{"width":32,"height":24,"hasAlpha":true,"gpsPresent":false,"iccPresent":true,"exifPresent":false,"orientation":null,"iccBytes":456,"iccSha256":"12afb4d9953adee0607d347daee5b78b18d6b3cab2d572b88970703f5edb37bc"}

fd0cd9f1b93c839403db4e58e8c6efe51f7553139cbdbe01b4f086911b57adef · 600

Recorded checks

summary

The description text is absent from the cleaned WebP. Alpha is still present. Dimensions stayed 32x24. GPS and EXIF are absent. An ICC profile is still present. Input ICC is 480 bytes c56e1685d888f5edb92fe07f2750f387f8fe8e91b32ff8fb0b56bfbbb9458353. Output ICC is 456 bytes 12afb4d9953adee0607d347daee5b78b18d6b3cab2d572b88970703f5edb37bc. This case is partial.

publicClaims

[]

image

{"width":32,"height":24,"hasAlpha":true,"gpsPresent":false,"iccPresent":true,"exifPresent":false,"orientation":null,"iccBytes":456,"iccSha256":"12afb4d9953adee0607d347daee5b78b18d6b3cab2d572b88970703f5edb37bc"}

requireAlpha

true

expectedAbsentStrings

["Synthetic webp alpha fixture"]

inputIcc

{"sha256":"c56e1685d888f5edb92fe07f2750f387f8fe8e91b32ff8fb0b56bfbbb9458353","bytes":480}

outputIcc

{"sha256":"12afb4d9953adee0607d347daee5b78b18d6b3cab2d572b88970703f5edb37bc","bytes":456}

observedStates

[{"t":1790925434308,"phase":"","rowState":"","busy":false,"progress":""},{"t":1790925434348,"phase":"","rowState":"queued","busy":false,"progress":""},{"t":1790925434532,"phase":"","rowState":"ready","busy":false,"progress":""},{"t":1790925434877,"phase":"","rowState":"ready","busy":false,"progress":""}]

blockedExistingTelemetry

[{"method":"GET","host":"static.cloudflareinsights.com","pathname":"/beacon.min.js/v31edd6df95cf4e85bb4c19e7a9bdbcba1788362987495","reason":"cloudflare-insights-beacon"}]

privacy

{"observedUnique":18,"violations":[],"scope":"Observed requests in this run only. Not a universal no-exfiltration certificate."}

pageErrorCount

0

Limitations recorded for this case

• No processing screenshot was published. After the shutter the UI state was: ready. An unpublished attempt was kept at assets/_shutter-attempts/metadata-webp-alpha-exif-processing.webp. That file is not a processing screenshot.
• GPS, EXIF, and the description string are absent on this download. The output ICC profile is present. Its SHA-256 differs from the input profile. This case is partial.
• Capture instrumentation aborts known preexisting Cloudflare telemetry at static.cloudflareinsights.com and /cdn-cgi/rum before transmission. That block is not evidence that production has no analytics.

Screenshots from the capture

Format

mp4

Bytes

1881

SHA-256

6df869f0f7ca9813a44dddea395b0c7f2c2f94d33fefc101ff77f6180c9bffdd

Licence

CC0-1.0

Source

tests/fixtures/media-corpus manifest MC-VID-003, constructed by scripts/generate-media-corpus.mjs. CC0-1.0 constructed original. Not regenerated by this capture.

Original fixture assets/metadata-removal/metadata-mp4-rotate-matrix-input.mp4

Actions used

• opened /
• uploaded mc-vid-h264-rotate90.mp4
• clicked #sanitizeBtn
• clicked #filesBtn
• saved download metadata-mp4-rotate-matrix-input_cleaned.mp4

Options recorded

rowState

ready

Recorded input

sha256

6df869f0f7ca9813a44dddea395b0c7f2c2f94d33fefc101ff77f6180c9bffdd

bytes

1881

video

{"codec":"h264","width":64,"height":48,"fps":12,"bitrate":15048,"durationSec":1,"audioCodec":"","audioPresent":false,"rotation":-90}

timestamps

{"videoStart":0,"videoEnd":1,"audioStart":null,"audioEnd":null,"startDriftSec":null,"endDriftSec":null,"scope":"this clip only; not a general A/V sync guarantee"}

probe

{"streams":[{"index":0,"codec_name":"h264","codec_long_name":"H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10","profile":"High","codec_type":"video","codec_tag_string":"avc1","codec_tag":"0x31637661","width":64,"height":48,"coded_width":64,"coded_height":48,"closed_captions":0,"film_grain":0,"has_b_frames":2,"sample_aspect_ratio":"1:1","display_aspect_ratio":"4:3","pix_fmt":"yuv420p","level":10,"chroma_location":"left","field_order":"progressive","refs":1,"is_avc":"true","nal_length_size":"4","id":"0x1","r_frame_rate":"12/1","avg_frame_rate":"12/1","time_base":"1/12288","start_pts":0,"start_time":"0.000000","duration_ts":12288,"duration":"1.000000","bit_rate":"6984","bits_per_raw_sample":"8","nb_frames":"12","extradata_size":43,"disposition":{"default":1,"dub":0,"original":0,"comment":0,"lyrics":0,"karaoke":0,"forced":0,"hearing_impaired":0,"visual_impaired":0,"clean_effects":0,"attached_pic":0,"timed_thumbnails":0,"non_diegetic":0,"captions":0,"descriptions":0,"metadata":0,"dependent":0,"still_image":0},"tags":{"language":"und","handler_name":"VideoHandler","vendor_id":"[0][0][0][0]","encoder":"Lavc libx264"},"side_data_list":[{"side_data_type":"Display Matrix","displaymatrix":"\n00000000: 0 65536 0\n00000001: -65536 0 0\n00000002: 0 0 1073741824\n","rotation":-90}]}],"format":{"nb_streams":1,"nb_programs":0,"format_name":"mov,mp4,m4a,3gp,3g2,mj2","format_long_name":"QuickTime / MOV","start_time":"0.000000","duration":"1.000000","size":"1881","bit_rate":"15048","probe_score":100,"tags":{"major_brand":"isom","minor_version":"512","compatible_brands":"isomiso2avc1mp41","encoder":"Lavf60.16.100"}}}

Output probe

streams

[{"index":0,"codec_name":"h264","codec_long_name":"H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10","profile":"High","codec_type":"video","codec_tag_string":"avc1","codec_tag":"0x31637661","width":64,"height":48,"coded_width":64,"coded_height":48,"closed_captions":0,"film_grain":0,"has_b_frames":2,"sample_aspect_ratio":"1:1","display_aspect_ratio":"4:3","pix_fmt":"yuv420p","level":10,"chroma_location":"left","field_order":"progressive","refs":1,"is_avc":"true","nal_length_size":"4","id":"0x1","r_frame_rate":"12/1","avg_frame_rate":"12/1","time_base":"1/12288","start_pts":0,"start_time":"0.000000","duration_ts":12288,"duration":"1.000000","bit_rate":"6984","bits_per_raw_sample":"8","nb_frames":"12","extradata_size":43,"disposition":{"default":1,"dub":0,"original":0,"comment":0,"lyrics":0,"karaoke":0,"forced":0,"hearing_impaired":0,"visual_impaired":0,"clean_effects":0,"attached_pic":0,"timed_thumbnails":0,"non_diegetic":0,"captions":0,"descriptions":0,"metadata":0,"dependent":0,"still_image":0},"tags":{"language":"und","handler_name":"VideoHandler","vendor_id":"[0][0][0][0]","encoder":"Lavc libx264"},"side_data_list":[{"side_data_type":"Display Matrix","displaymatrix":"\n00000000: 0 65536 0\n00000001: -65536 0 0\n00000002: 0 0 1073741824\n","rotation":-90}]}]

format

{"nb_streams":1,"nb_programs":0,"format_name":"mov,mp4,m4a,3gp,3g2,mj2","format_long_name":"QuickTime / MOV","start_time":"0.000000","duration":"1.000000","size":"1881","bit_rate":"15048","probe_score":100,"tags":{"major_brand":"isom","minor_version":"512","compatible_brands":"isomiso2avc1mp41"}}

491ef1400a8b0b98ab4a940a53dec78599da3ced86b988c5e51a5b91989671b5 · 1881

Recorded checks

summary

ffprobe rotation on the cleaned MP4 is -90. The cleaner strips user-data boxes. This measurement is the display matrix result for this file.

publicClaims

[]

video

{"codec":"h264","width":64,"height":48,"fps":12,"bitrate":15048,"durationSec":1,"audioCodec":"","audioPresent":false,"rotation":-90}

timestamps

{"videoStart":0,"videoEnd":1,"audioStart":null,"audioEnd":null,"startDriftSec":null,"endDriftSec":null,"scope":"this clip only; not a general A/V sync guarantee"}

displayMatrixRetained

true

observedStates

[{"t":1790925436072,"phase":"","rowState":"","busy":false,"progress":""},{"t":1790925436113,"phase":"","rowState":"queued","busy":false,"progress":""},{"t":1790925436300,"phase":"","rowState":"ready","busy":false,"progress":""},{"t":1790925436593,"phase":"","rowState":"ready","busy":false,"progress":""}]

blockedExistingTelemetry

[{"method":"GET","host":"static.cloudflareinsights.com","pathname":"/beacon.min.js/v31edd6df95cf4e85bb4c19e7a9bdbcba1788362987495","reason":"cloudflare-insights-beacon"}]

privacy

{"observedUnique":17,"violations":[],"scope":"Observed requests in this run only. Not a universal no-exfiltration certificate."}

pageErrorCount

0

Limitations recorded for this case

• No processing screenshot was published. After the shutter the UI state was: ready. An unpublished attempt was kept at assets/_shutter-attempts/metadata-mp4-rotate-matrix-processing.webp. That file is not a processing screenshot.
• A retained matrix on this file is a partial result.
• Capture instrumentation aborts known preexisting Cloudflare telemetry at static.cloudflareinsights.com and /cdn-cgi/rum before transmission. That block is not evidence that production has no analytics.

Screenshots from the capture

Format

pdf

Bytes

1295

SHA-256

e721e156a5478ad5666dd3ae330c218618fcb77b0da5c9e3656befff62c31fe7

Licence

CC0-1.0

Source

tests/fixtures/media-corpus manifest MC-PDF-004, constructed by scripts/generate-media-corpus.mjs. CC0-1.0 constructed original. Not regenerated by this capture.

Original fixture assets/metadata-removal/metadata-pdf-custom-info-input.pdf

Actions used

• opened /tools/pdf/?mode=metadata
• uploaded mc-pdf-metadata-partial.pdf
• clicked #mode-info
• clicked #clear-meta-btn
• clicked #result-save

Options recorded

pageScope

Clears standard document metadata supported by this local editor. It does not remove XMP, attachments, forms, annotations, JavaScript, signatures, or embedded files.

Recorded input

sha256

e721e156a5478ad5666dd3ae330c218618fcb77b0da5c9e3656befff62c31fe7

bytes

1295

pdf

{"standard":{"title":"Corpus Info Dictionary Boundary","author":"Fixture Desk","subject":"","keywords":"","creator":"cpk-media-corpus","producer":"pdf-lib"},"customNote":"corpus-custom-note","pageCount":1,"visibleTextIncludes":"Page sentence remains after Info dictionary edits."}

Output probe

standard

{"title":"","author":"","subject":"","keywords":"","creator":"","producer":""}

customNote

corpus-custom-note

pageCount

1

7136831d5eb2d9b72483445bb23c4e5d7c24d6cbc31168ed23db9f50562d2b30 · 801

Recorded checks

summary

pdf-lib standard fields on this export are empty. CustomNote is present. pdftotext includes the fixture page sentence on this file.

publicClaims

["pdf-lib standard fields on this export are empty. CustomNote is present. pdftotext includes the fixture page sentence on this file."]

pdf

{"standard":{"title":"","author":"","subject":"","keywords":"","creator":"","producer":""},"customNote":"corpus-custom-note","pageCount":1,"visibleTextIncludes":"Page sentence remains after Info dictionary edits."}

customInfoRetained

true

visibleTextRetained

true

observedStates

[{"t":1790925438401,"phase":"","rowState":"","busy":false,"progress":""},{"t":1790925441450,"phase":"","rowState":"","busy":false,"progress":""},{"t":1790925441482,"phase":"","rowState":"","busy":false,"progress":""},{"t":1790925441697,"phase":"","rowState":"","busy":false,"progress":""},{"t":1790925441771,"phase":"","rowState":"","busy":false,"progress":""},{"t":1790925441960,"phase":"","rowState":"","busy":false,"progress":""}]

blockedExistingTelemetry

[{"method":"GET","host":"static.cloudflareinsights.com","pathname":"/beacon.min.js/v31edd6df95cf4e85bb4c19e7a9bdbcba1788362987495","reason":"cloudflare-insights-beacon"}]

privacy

{"observedUnique":14,"violations":[],"scope":"Observed requests in this run only. Not a universal no-exfiltration certificate."}

pageErrorCount

0

Limitations recorded for this case

• No processing screenshot was stored. The UI state read at shutter time was: result overlay visible.
• Standard Info fields are empty on this export. Custom data or the known page sentence can still remain. This file does not show that every PDF field is cleared.
• Capture instrumentation aborts known preexisting Cloudflare telemetry at static.cloudflareinsights.com and /cdn-cgi/rum before transmission. That block is not evidence that production has no analytics.

Screenshots from the capture

Format

jpeg

Bytes

1128

SHA-256

ee25fff39d5e06e79147c9c7c7d4dfea76e756ad3dfb0bcd7d821777f4444138

Licence

CC0-1.0

Source

tests/fixtures/media-corpus manifest MC-IMG-005, constructed by scripts/generate-media-corpus.mjs. CC0-1.0 constructed original. Not regenerated by this capture.

Original fixture assets/metadata-removal/metadata-jpeg-truncated-reject-input.jpg

Actions used

• opened /
• uploaded mc-img-jpeg-truncated.jpg
• clicked #sanitizeBtn

Options recorded

rowState

error

Recorded input

sha256

ee25fff39d5e06e79147c9c7c7d4dfea76e756ad3dfb0bcd7d821777f4444138

bytes

1128

image

{"decodeOk":false}

This case has no downloaded output in the capture.

Recorded checks

summary

The cleaner row for mc-img-jpeg-truncated.jpg ended in error and no cleaned file was saved.

publicClaims

[]

rejectionObserved

true

observedStates

[{"t":1790925443189,"phase":"","rowState":"","busy":false,"progress":""},{"t":1790925443229,"phase":"","rowState":"queued","busy":false,"progress":""},{"t":1790925443427,"phase":"","rowState":"error","busy":false,"progress":""}]

blockedExistingTelemetry

[{"method":"GET","host":"static.cloudflareinsights.com","pathname":"/beacon.min.js/v31edd6df95cf4e85bb4c19e7a9bdbcba1788362987495","reason":"cloudflare-insights-beacon"}]

privacy

{"observedUnique":18,"violations":[],"scope":"Observed requests in this run only. Not a universal no-exfiltration certificate."}

pageErrorCount

0

Limitations recorded for this case

• No processing screenshot was published. After the shutter the UI state was: error. An unpublished attempt was kept at assets/_shutter-attempts/metadata-jpeg-truncated-reject-processing.webp. That file is not a processing screenshot.
• Capture instrumentation aborts known preexisting Cloudflare telemetry at static.cloudflareinsights.com and /cdn-cgi/rum before transmission. That block is not evidence that production has no analytics.

Screenshots from the capture