Where is this picture from? How do I use Reverse Image Search to find the source of an anime/manga image? So I see an image that I believe is from either an anime or a manga. What are some ways that I can go about finding what series it's from?
Try these options:

Google reverse image search (browser built-in support and plugins)
Other reverse image search engines: TinEye, SauceNao, iqdb
Search engine tailored to searching anime by screenshots
Search for an anime or manga character
Technique: Cropping the image
Animated GIF: Picking the right frame


Note: Please note that as of May 9, 2016, ALL identification-request questions are now off-topic. Therefore, you can't ask an identification request question on this site.
However, such questions are still welcome in our main chat for users with at least 20 rep (globally on StackExchange).



Protip: If you are using Google Image Search in a non-English language, change your language to English or just use Google NCR for better, more accurate results.
Google reverse image search

Chrome for desktop

Let's say you saw an interesting image online and you want to identify the anime it's from. To do this, you'll have to:


Right-click on the image.
Click "Search Google for this image".



and here it is:






Using another desktop browser


  Note: If you are using Firefox, you can download the Search By Image (by Google) plugin and search for images like when using Chrome. If you use a Chromium based browser (like Opera), you can download the same extension from Chrome Web Store.


To search for images on browsers other than Chrome, you'll have to:


Go to Google image search.
Press the camera button.
Paste the image URL, or upload a file from your computer.






Using Chrome for mobile

Just press and hold the image and click "Search Google for this image".





Using another mobile browser

Switch your browser to desktop mode, and then follow the steps in Using another desktop browser.