219977 2020-12-16 22:19:25 -0800 WebP loading error in Safari on iOS 14.3 2025-12-15 07:57:03 -0800 1 1 1 Unclassified WebKit Images Safari 14 iPhone / iPad iOS 14 RESOLVED INVALID https://bugs.webkit.org/show_bug.cgi?id=236622 InRadar P2 Normal --- 1 zproject.develop webkit-unassigned bobsingor bouakkazridha1110 BRAIDYMERKLE e erik+webkit mail mathias.latournerie me radek.sery steven webkit-bug-importer oldest_to_newest 1715321 0 416391 zproject.develop 2020-12-16 22:19:25 -0800 Created attachment 416391 Reproducible image Some WebP images can no longer be read in iOS 14.3. There was no problem until iOS 14.2. We have prepared a page to check the problem. https://zprodev.github.io/ios14_3_webp_error/index.html User Agent on my device : Mozilla/5.0 (iPhone; CPU iPhone OS 14_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.2 Mobile/15E148 Safari/604.1 1715864 1 webkit-bug-importer 2020-12-18 17:06:57 -0800 <rdar://problem/72485913> 1717331 2 ap 2021-01-05 08:57:47 -0800 *** Bug 220317 has been marked as a duplicate of this bug. *** 1717334 3 ap 2021-01-05 08:59:12 -0800 Thank you for the report! Marking as invalid because this was determined to be an issue in system frameworks below WebKit. This will continue to be investigated by Apple internally. 1719914 4 ap 2021-01-15 10:08:13 -0800 *** Bug 220629 has been marked as a duplicate of this bug. *** 1720954 5 ysuzuki 2021-01-20 11:48:58 -0800 *** Bug 220775 has been marked as a duplicate of this bug. *** 1721010 6 e 2021-01-20 14:40:47 -0800 Cloudinary is attempting to work around this issue by turning off WebP support to affected clients. If this is indeed about the underlying OS frameworks, rather than the browser version, as far as we can tell it appeared sometime after MacOS 11.0.1 and before or in 11.1.0. All we have been able to narrow down on the iOS side is ≥14.0. If you have additional guidance on which versions of the OSes are affected, so that we can prevent Safari users from receiving broken images, it would be much appreciated! 1721940 7 ap 2021-01-24 17:13:14 -0800 *** Bug 220853 has been marked as a duplicate of this bug. *** 1722753 8 me 2021-01-26 15:45:29 -0800 I have some more version numbers, although I'm uncertain if they give anything not already known. Fails (i.e., image doesn't load): iOS 14.3, iOS 14.4, macOS 11.1 Works: iOS 14.0.1 I'm uploading a second image which fails in the same scenarios as the page linked in the initial report. 1722754 9 418482 me 2021-01-26 15:46:45 -0800 Created attachment 418482 A second bad WebP image Downloaded from <https://commons.wikimedia.org/wiki/File:Chessboard480.svg> via cURL: curl 'https://upload.wikimedia.org/wikipedia/commons/thumb/d/d7/Chessboard480.svg/416px-Chessboard480.svg.png' -H 'Accept: image/webp' --output 'WebP loading error.webp' Replacing "416" with "200" gives a WebP file that /does/ work. I haven't tested much further beyond that. 1723055 10 e 2021-01-27 10:42:34 -0800 Re: Perry in Comment #9 When I replace "416" with "200" I actually get a PNG back instead of a WebP? Not sure what decision making is happening on the server... --- I compiled all of the example images here, plus a couple that we've received from Cloudinary customers: https://ericportis.com/etc/broken-webps/ The one pattern that jumps out to me is that most of the broken images seem to have palletized color information in some channel; sometimes in the alpha channel (e.g., "lamp"), other times in color channels (e.g., "stripes", "chessboard"). Two possible exceptions are "blue" and "text". Looking at the image content I would kind of expect indexing (they both have very limited color palletes), but their webpinfos don't mention indexing as a transform, as every other image does... If anyone from Apple could confirm our understanding of which versions of MacOS and iOS are affected, or share any information that could give us a sense of either the scale or cause of the problem, it would be *very* helpful. 1723064 11 me 2021-01-27 11:01:22 -0800 (In reply to Eric Portis from comment #10) > Re: Perry in Comment #9 > > When I replace "416" with "200" I actually get a PNG back instead of a WebP? > Not sure what decision making is happening on the server... If the Accept header is set to image/webp it serves it as a webp for me—going to the URL in a browser seems to serve it as a PNG. (See the curl command in comment 8.) I'm not super confident that there'll be too much follow-up on the bug itself, especially as this isn't even a WebKit issue, but an internal one. I'm happy to be proved wrong though ;). 1723090 12 e 2021-01-27 11:49:19 -0800 Re: Perry in Comment #10 % curl 'https://upload.wikimedia.org/wikipedia/commons/thumb/d/d7/Chessboard480.svg/200px-Chessboard480.svg.png' -H 'Accept: image/webp' --output 'isthisa.webp'; webpinfo isthisa.webp; exiftool isthisa.webp % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 668 100 668 0 0 3976 0 --:--:-- --:--:-- --:--:-- 3952 File: isthisa.webp Errors detected. ExifTool Version Number : 12.00 File Name : isthisa.webp Directory : . File Size : 668 bytes File Modification Date/Time : 2021:01:27 11:47:56-08:00 File Access Date/Time : 2021:01:27 11:47:56-08:00 File Inode Change Date/Time : 2021:01:27 11:47:56-08:00 File Permissions : rw-r--r-- File Type : PNG File Type Extension : png MIME Type : image/png Image Width : 200 Image Height : 200 Bit Depth : 8 Color Type : RGB Compression : Deflate/Inflate Filter : Adaptive Interlace : Noninterlaced Background Color : 255 255 255 Image Size : 200x200 Megapixels : 0.040 1724476 13 e 2021-02-01 17:16:11 -0800 Tried my luck at creating WebPs that fail today... had some luck but am more confused now than ever. https://ericportis.com/etc/tiny-webps/ 1734051 14 421723 erik+webkit 2021-02-26 15:57:58 -0800 Created attachment 421723 Solid black color This is what cwebp spits out for a PNG with purely black color. 1734052 15 421724 erik+webkit 2021-02-26 16:00:25 -0800 Created attachment 421724 Solid hex 121212 color And this is even smaller image filled only with RGB hex 121212 color. 1762455 16 BRAIDYMERKLE 2021-05-21 09:53:16 -0700 fwiw to anyone looking into this issue: an OS upgrade to 14.5.1 appears to have resolved this bug for me. 1849726 17 454255 bobsingor 2022-03-09 09:53:50 -0800 Created attachment 454255 Example of a webp image that is not working on Safari 1914199 18 e 2022-11-22 16:18:29 -0800 This issue appears to have been fully fixed in macOS 13 Ventura. However, today I discovered a seemingly-related issue, affecting JPEG2000s. https://bugs.webkit.org/show_bug.cgi?id=248249 FB11815925 2165920 19 421723 bouakkazridha1110 2025-12-15 07:56:19 -0800 Comment on attachment 421723 Solid black color RIDHA RB12 2165921 20 bouakkazridha1110 2025-12-15 07:57:03 -0800 (In reply to Alexey Proskuryakov from comment #4) > *** Bug 220629 has been marked as a duplicate of this bug. *** <input type="file" accept="image/*" capture> 416391 2020-12-16 22:19:25 -0800 2020-12-16 22:19:25 -0800 Reproducible image error.webp image/webp 812 zproject.develop UklGRiQDAABXRUJQVlA4TBcDAAAvj8OHEO/iIJIkRUr/Cg8cwDNj2YAcSZIiyc1Wf/1498/Mdx1u I0lSpPTfwrt79SVm/t9y3EiSIlUtHDOfEeu/R/djht7OgCrwBvigBUhQ7SuBSpUq/f7/gPvzkRXP 9yuX7eZ3uV2j0rxYvb9/Pyr9x2B/PESlShXP94thOr0rVVSq9JyMZtmsOzAWMIwNDKOBMUEPxhiG MYaxwwAjVDBKFNW9OuILqg9AVJ//GAf8/mN8wX+MN7JqAUACBK4AP1yQAB8ErgBAlm3bqhOdc9/j GZIEIri7u7vbDe7Q/4Y4/J6qsSL6PwHy6fDU0sraptFdXV6cGpVvjs/3V4qNDWp0c03FSs/8+Jem +8u1anyzcv/0Z4MzXXlVF0ZxYnTjmtCp5tpnhz6abc3URYnxjZymLbMfTHemGiQGONC0c1pExvpz GiQmONBc/4TIXFldYoSdlhZkpC/TyApFmvWNTFbUJWbYaWVysaihHQq1uLhS0MgORVpYWWvQ2A7F Wr++qZoYYtVN/If/8B/+w3/4D//hP/yH//Af/vvv2YCp/RuWF//hP/yH//Af/sN/+A//4T/8h//w H/7Df/gP/+E//If/8B/+w3/4D//hP/yH//Af/sN/+A//4T/8h//wH/7Df/gP/+E//If/8B/+w3/4 D//hP/yH//Af/sN/+A//4T/8h//wH/7Df/gP/+E//If/8B/+w3/4D//hP/yH//Af/sN/+A//4T/8 h//wH/7Df/gP/+E//If/8B/+w3/4D//hP/yH//Dfv6vWGjS2Q7HWr68UNLJDkRZWlooa2qFQi4uT FXV2yGllcrQ308gKRZr1jspuSZ0VclraFTnuz2lggwLN9R+L3Bx0pBpYoEDTjoNbkXu/15qpi6xP 5DRt3vP3Iq/V8/2uvKoLo9jqxFHoVHNte2fVVxG58/6gv5Sp8c1K/Qfe34mIvF16f7TTXykW6qxO XaFY6d458v7y7Z08ee/96eH21sam0d3Y2j488d77J/n4sept8IN8/nxlgS6f5Ktvd1XrU717k2++ 3d9cX1idi+ub+xf5FAA= 418482 2021-01-26 15:46:45 -0800 2021-01-26 15:46:45 -0800 A second bad WebP image WebP loading error.webp image/webp 98 me UklGRloAAABXRUJQVlA4TE4AAAAvn8FnAA/wXudL/98zdf5jCQraSJFwgH+XOIB7x8Ekov9i0gQL 7LVCXFVf2SfiW94WBUXAGCgoAsZAQREwBgqKgDFQUASMgYIiYAwMFBE= 421723 2021-02-26 15:57:58 -0800 2021-02-26 15:57:58 -0800 Solid black color color_000000.webp image/webp 54 erik+webkit UklGRi4AAABXRUJQVlA4TCIAAAAvV8KVAAcQEf0PACjS//8U0f/U//73v//973//+9///oce 421724 2021-02-26 16:00:25 -0800 2021-02-26 16:00:25 -0800 Solid hex 121212 color color_121212.webp image/webp 38 erik+webkit UklGRh4AAABXRUJQVlA4TBEAAAAvn8AnAAdQiUpUov+BiOh/AAA= 454255 2022-03-09 09:53:50 -0800 2022-03-09 09:53:50 -0800 Example of a webp image that is not working on Safari img_p14_2.webp image/webp 242 bobsingor UklGRuoAAABXRUJQVlA4TN4AAAAvB8fgEBcgEEjyp9lwDQFB0Xi/CQSS/HEWfP4D/hUwiCQpzoFH /GAHlJL/T0f0fwKC//mf//mf//mf//mf//mf//mf/5+I/aLUoxyXY+U//uM//uM//uM//uM//uM/ /uM//uM//uM//uM//uM//uM//uM//uM//uM//uM//uM//uM//uM//uM//uM//uM//uM//uM//uM/ /uM//uM//uM//uM//uOqcpon/uM//uM//uM//uM//uM//vs8GnyetT7YjoafZynWm//4j//4742E //mf//mf//mf//mfHgE=