How to Rename Photos on Windows
Windows has a quick built-in method for renaming a group of photos with a shared name and a number. Open File Explorer, select the photos you want (Ctrl+A for everything, or Ctrl+click for specific ones), press F2 or right-click and choose Rename, type a base name, and press Enter. Windows names the first file with your text and appends the rest as Name (1).jpg, Name (2).jpg, and so on.
This is instant and free, and it is the right tool when your photos just need a tidy shared label. Its limit is that it renames by a pattern only. It cannot read what is in the image, so it can number a folder of shots but it cannot tell a beach photo from a birthday. For that, you need content-based renaming.
How to Rename Photos on a Mac
Finder gives you a bit more control. Select the photos, right-click, and choose Rename Items. The Format option adds a base name plus a counter, with a custom starting number and zero-padding, and a live preview before you apply. You can also use Replace Text to swap part of an existing name across the whole selection.
Like Windows, Finder is fast, free, and offline, and like Windows it renames by pattern rather than by content. It knows nothing about what each photo shows, so it is perfect for sequential naming and useless for turning IMG_4821.jpg into a name that tells you it is a sunset in Lisbon.
How to Rename Photos by What They Show
When the filename needs to describe the actual photo, the tool has to read the image. Renamer.ai passes each photo through an AI vision model that identifies the subject, scene, and activity, reads any visible text, and pulls the camera-written capture date, then combines those into one descriptive filename. A picture of a child blowing out candles becomes a name about a birthday, not a counter.
This is the method that scales. Because the name comes from the content, it stays accurate across a varied library, and the date is formatted the same way every time so everything sorts chronologically. It is the only approach here that makes a folder of camera-counter names genuinely searchable.
Which Method Should You Use?
If your photos only need a clean shared name and a number, the built-in Windows or Mac rename is done in seconds and costs nothing. Reach for it whenever a simple sequence is all you want.
If the names are meaningless and you want to actually find photos later, no manual pattern will get you there, because the information you need is inside the image, not in the current filename. That is the case content-based AI renaming is built for, and it is why you can hand it a folder of IMG_ files and get back names you can read at a glance.