Commons:CropTool
CropTool je nástroj MediaWiki pro ořez obrázků na Wikimedia Commons a ostatních projektů Wikimedia. Podporuje formáty JPEG, PNG, TIFF a (animované) GIF, a také umí extrahovat jednotlivé stránky z formátů DJVU a PDF jako JPEG k ořezu. CropTool je inspirovaný Cropbotem, ale přidává některé nové funkce, jako například OAuth pro autorizaci a automatickou detekci okraje. Běží na Toolforge a zdrojový kód je dostupný na GitHubu. Poslední užití nástroje je dostupné z posledních změn.
Setup
After activation, it will appear in the “Tools” menu of the left column.
Alternatively: go to toolforge.
Tutorial
| 1. Here is an image that should have its border removed. Start by clicking “CropTool” in the “Tools” menu. | 
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| 2. To use CropTool, you need to authorize it to use your Wikimedia Commons account using OAuth. | 
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| 3. This will take you to a secure MediaWiki OAuth server. Note that your password is never transmitted to CropTool. | 
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| 4. Make a selection with the cursor and press “Preview”. In this case, we need to make an exact (Precise mode) crop, since we want to keep as much of the image as possible, while removing the border. Note that in many cases an inexact (Lossless mode) is completely sufficient and recommended. | 
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| 5. Looks good, so we can go ahead and press “Upload”. | 
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Install on other projects
If the CropTool is not present as a gadget in your local Wikimedia project (like Wikipedia), you can install it (manually in your user JavaScript settings) with following code:
mw.loader.load('//commons.wikimedia.org/w/load.php?modules=ext.gadget.CropTool');
Install globally
If you want to have CropTool active on all Wikimedia projects you may use the following code at m:Special:MyPage/global.js. Don't forget to disable CropTool on all projects before you add it globally.
if (mw.config.get('wgNamespaceNumber') === 6 && mw.config.get('wgIsArticle'))
mw.loader.load( '//commons.wikimedia.org/w/index.php?title=MediaWiki:Gadget-CropTool.js&action=raw&ctype=text/javascript' );
Problems
- Sometimes, immediately after you overwrite a file, you do not see apparent changes to it, or it appears "distorted". This is usually caused by caching. To solve the problem, you can simply purge the page. Append
?action=purgeto the URL and then press ↵ Enter. If that doesn't solve the problem, follow the instructions at w:Wikipedia:Bypass your cache/Simple instructions. - Between September 2020 and 19 February 2024, all cropping was done using lossy mode ("precise" mode), even if lossless mode was selected and the tool said that a lossless crop was performed.
- Crops from large TIFF files are sometimes compressed leading to broken files
If you encounter other problems, please check Commons talk:CropTool and https://github.com/danmichaelo/croptool/issues and write a bug report if necessary.