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LICENSE

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+Creative Commons Legal Code
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README.md

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 ---
 license: cc0-1.0
+language:
+- en
+pretty_name: YouTube Image Specifications
+configs:
+- config_name: thumbnails
+  data_files:
+  - split: train
+    path: youtube-thumbnail-size.csv
+- config_name: banners
+  data_files:
+  - split: train
+    path: youtube-banner-size.csv
 ---
+
+# YouTube Image Specifications
+
+A dated reference dataset of YouTube thumbnail, channel banner, and profile-picture specifications, maintained by Ethereal49.
+
+The tables accompany the image tools and size guides at [ThumbGlance](https://thumbglance.com).
+
+## Files
+
+- `youtube-thumbnail-size.csv`: 7 records covering video thumbnails, Shorts thumbnails, podcast playlist thumbnails, channel banners, and profile pictures.
+- `youtube-banner-size.csv`: 4 records distinguishing the minimum upload canvas, recommended canvas, and desktop/mobile layout contexts.
+- `README.md`: provenance, verification method, limitations, and citation guidance.
+- `LICENSE`: CC0 1.0 Universal legal text.
+
+## Sources and verification
+
+Checked on **2026-09-16**. Each record includes its official source URL and check date. Specifications were compared with the English YouTube Help pages linked in each row:
+
+- [Add video thumbnails on YouTube](https://support.google.com/youtube/answer/72431?hl=en), including the desktop and Android variants.
+- [Manage your channel branding](https://support.google.com/youtube/answer/10456525?hl=en).
+
+The source CSV files were retrieved from [the thumbnail table](https://thumbglance.com/youtube-thumbnail-size.csv) and [the banner table](https://thumbglance.com/youtube-banner-size.csv). The thumbnail CSV is unchanged. In the banner CSV, calculated model dimensions and simulated cropping descriptions were replaced with explicit statements that the corresponding device-specific values are not stated by YouTube. All other source values and row labels were retained. The original labels containing "simulation" identify layout contexts only; this edition supplies no simulated measurements.
+
+Values marked "not stated" are not specified in the cited guidance. No device display measurements or estimated dimensions are included. Official reference dimensions at the minimum upload canvas do not establish device-specific safe areas at other canvas sizes. Rows were checked by reading the cited documentation, not by measuring device screenshots or testing upload limits.
+
+CSV files use UTF-8 with a byte-order mark and a header row. Values are descriptive strings, preserving units, device distinctions, and qualifications. The two tables have different schemas and are exposed as separate dataset configurations.
+
+## Scope and limitations
+
+This is a dated snapshot, not an official YouTube publication. Requirements can change; consult the linked official guidance before relying on a value. Blank or undocumented requirements must not be inferred from another device or upload type.
+
+## Citation
+
+Ethereal49. *YouTube Image Specifications*. Checked 2026-09-16. https://github.com/Ethereal49/thumbglance-specifications. Cite a specific commit URL when a fixed snapshot is needed.
+
+## License
+
+This dataset is dedicated to the public domain under **CC0 1.0 Universal** (`cc0-1.0`); see [LICENSE](LICENSE). The dedication applies to this dataset and does not change the terms of the linked source websites or imply endorsement by YouTube.

youtube-banner-size.csv

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+Device / layout,Visible region,Safe area,Cropping behavior,Official source,Checked on
+Minimum upload canvas,"2048 x 1152 px; 16:9. This is an upload canvas, not a device viewport.",1235 x 338 px at this minimum canvas size.,Device-specific crop coordinates are not stated by YouTube.,https://support.google.com/youtube/answer/10456525?hl=en,2026-09-16
+Recommended canvas (especially for TV),2560 x 1440 px. Exact TV-visible region: not stated by YouTube.,At this canvas size: not stated by YouTube.,Device-specific crop coordinates are not stated by YouTube.,https://support.google.com/youtube/answer/10456525?hl=en,2026-09-16
+Desktop simulation,Actual device-visible pixels: not stated by YouTube.,Official reference: 1235 x 338 px at 2048 x 1152. At 2560 x 1440: not stated by YouTube.,Device-specific crop coordinates are not stated by YouTube.,https://support.google.com/youtube/answer/10456525?hl=en,2026-09-16
+Mobile simulation,Actual device-visible pixels: not stated by YouTube.,Official reference: 1235 x 338 px at 2048 x 1152. At 2560 x 1440: not stated by YouTube.,Device-specific crop coordinates are not stated by YouTube.,https://support.google.com/youtube/answer/10456525?hl=en,2026-09-16

youtube-thumbnail-size.csv

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+Placement / upload device,Dimensions,Aspect ratio,File size limit,Official source,Checked on
+Video thumbnail / desktop upload,3840 x 2160 pixels recommended; minimum width 640 pixels.,16:9,Under 50 MB,https://support.google.com/youtube/answer/72431?hl=en&co=GENIE.Platform%3DDesktop,2026-09-16
+Video thumbnail / mobile upload,3840 x 2160 pixels recommended; minimum width 640 pixels.,16:9,Under 2 MB,https://support.google.com/youtube/answer/72431?hl=en&co=GENIE.Platform%3DAndroid,2026-09-16
+Shorts custom thumbnail / desktop upload,2160 x 3840 pixels recommended; minimum height 640 pixels.,9:16,Under 50 MB,https://support.google.com/youtube/answer/72431?hl=en&co=GENIE.Platform%3DDesktop,2026-09-16
+Shorts custom thumbnail / mobile upload,Not available: custom Shorts thumbnails can only be added in YouTube Studio on a computer.,Not stated by YouTube in the cited guidance.,Not stated by YouTube in the cited guidance.,https://support.google.com/youtube/answer/72431?hl=en&co=GENIE.Platform%3DAndroid,2026-09-16
+Podcast playlist thumbnail,Not stated by YouTube in the cited guidance.,1:1,Mobile: under 10 MB; desktop: under 50 MB.,https://support.google.com/youtube/answer/72431?hl=en&co=GENIE.Platform%3DDesktop,2026-09-16
+Channel banner,Recommended: 2560 x 1440 px (especially for TV). Minimum upload: 2048 x 1152 px. Text/logo safe area at that minimum: 1235 x 338 px.,16:9,6 MB or smaller,https://support.google.com/youtube/answer/10456525?hl=en,2026-09-16
+Channel profile picture,Renders at 98 X 98 px. Upload pixel dimensions: not stated by YouTube in the cited guidance.,Upload ratio: not stated by YouTube in the cited guidance.,Should not exceed 15 MB,https://support.google.com/youtube/answer/10456525?hl=en,2026-09-16