The Top 3 Apps to Batch Rename, Convert & Resize Photos (Windows only)

Simon Slangen 18-10-2009

The Top 3 Apps to Batch Rename, Convert & Resize Photos (Windows only) gearsWhen working with a lot of files, it can be useful to append some sort of pattern in naming, size, or otherwise. However, you’ll often get a lot of these mixed up. Even more so when working with huge batches of pictures.


If you want to attain some order, editing those pictures is necessary. If you’ve got a somewhat decent collection, this can be a long and tedious task – unless you use a batch processing application.

These ‘batch applications’ can process your pictures automatically, editing an incredibly big batch of files with the click of a mouse. These kind of editing macros can save you a lot of effort, and makes the (practically) impossible possible.

Batch Renaming – Rename Master

A batch renaming application will append the same naming structure on all of your files. This is one of the most prominent reasons for batch processing; to change those damn ugly and incompatible filenames into something useful.

batch picture rename

Rename Master is the king of the (freeware) rename applications. Not only can it create new nametags for whole folders at once, more flexible naming schemes can be composed to reuse previous parts of the filenames, or even use metadata like the dates those pictures were taken. Too fancy? Just jot down a fancy name with a numbering prefix or suffix.

As a surplus, Rename Master can also be used to rename other types of files.


You might also want to check out Saikat’s post on Renaming Pictures with the Date They Were Shot How To Automatically Batch Rename Photos With Dates They Were Shot Read More .

Batch Resizing – Photosizer

Fotosizer will – as the name implies – resize all of your pictures. You can do this by defining a percentage, or by supplying maximum width and height dimensions. Alternatively, you can also use a preset size, to prep your images for custom displays, like a PSP or iPod. A tool like this is especially handy if you’re working with extremely high resolution photography, and want to create some lighter, screen-friendly duplicates.

batch picture resize

Fotosizer is nice on the eye, and has an easy to use interface. If you want, you can also use Fotosizer to rename your pictures, although I find it less advanced and more complicated to use than Rename Master.


You can also take a look at Jimmy’s post on Batch Editing Your Images with GIMP Batch Edit Your Images with GIMP Read More .

Mac fanatics might want to check out Jackson’s post on Pixer.

Batch Convert (+ Resize) – PicSizer

PicSizer is actually a resizing application (who would guess?). Nevertheless, It doesn’t offer any advantages over Fotosize – except conversion functionality. In this article, I will regard solely PicSizer as such – a tool to lift images from one filetype to another, because to be honest, it does this better than most other freeware batch conversion applications.



PicSizer supports a few file formats, including about all the popular ones; JPG, GIF, BMP, TIFF, TGA and PNG. The application can also convert images between these formats. If you choose JPG or PNG – which I advise – you can even choose your compression ratio.

With these three tools, you should have pretty much all of the batch image manipulations covered. Note that not all of these applications are excessively present in the freeware world, and we had to look at a resizing app to get decent conversion functionality. If you know of any other – perhaps better? – batch processing tools, you can tell us in the comments section below.

Related topics: Image Converter, Image Editor, Photography.

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  1. Ajarn Spencer
    February 18, 2015 at 9:54 pm

    you can do it in Preview no need for a third party app.

    open Finder, select a group of images and open them all with the Preview App.
    once they are opened in Preview: Select All, either by hitting ?+A (Command+A) or by clicking the Edit menu and select that option
    go to Tools -> Adjust Size
    enter a value for the new width and height, then hit OK
    go to File and click Save All or to save a NEW resized version, choose Export Selected Images or just "Save As"

  2. Susan
    December 29, 2009 at 1:40 pm

    I'm puzzled by the large number of negative comments people have posted on WOT for the site for downloading Rename Master. ( There are a lot of comments saying it contains malware. Any idea whether they're accurate or not?

  3. Andrew
    December 6, 2009 at 7:31 am

    Check out if you want to do batch image resizing but dont want to install (yet another) program. Runs in the browser as a java applet, so no need to upload/download images to a server! (thats my pet peeve about all the other online image resizers)

  4. Jim
    November 2, 2009 at 9:05 am

    There is a windows shell program where you can resize pictures with a simple right click on the file. FAR faster.

  5. b
    October 26, 2009 at 6:06 am

    Microsoft Office Picture Manager does the job well. I fyou have Office installed, you don't really need any extra programs.

  6. Chris Reddy
    October 26, 2009 at 6:05 am

    Tim - one of the best all around image "manipulation" tools (not editing) is Irfanview. It not only converts between a huge list of file formats, but has a batch mode that can be used on hundreds or tens of thousands of images at once - excellent product - and free.

  7. Joan M.
    October 25, 2009 at 5:15 pm

    As tekunik says, it's unnecessary to use three separate programs for operations that a single program can perform so well (Irfanview).

  8. Win
    October 21, 2009 at 6:24 am

    Was looking for these type of utilities. Just in time, I'll be trying the apps you have featured and will choose which one works for me. Thank you!

  9. Travis
    October 19, 2009 at 1:02 pm

    FastStone Photo Resizer is one of the best programs I have found to do batch image resizing/renaming/converting/etc.

  10. Todd Peterson
    October 19, 2009 at 10:49 am

    gThumb Image Viewer is a great programme. I use that each time import my pictures.

  11. John K
    October 19, 2009 at 6:40 am

    I agree too that IrfanView is the one program you can use to do all this, including batch conversion and batch renaming.

  12. tekunik
    October 19, 2009 at 12:40 am

    I like IrfanView which has lots of other functionalities.I wrote two articles about batch resizing and batch EXIF remover.
    batch Resize:
    batch EXIF remover:

  13. ILoveFreeSoftware
    October 19, 2009 at 12:12 am

    picsizer seems to be a good one. Batch conversion is a natively complex process, and its good to see that there is a freeware that handles it so well.

  14. Saravana
    October 19, 2009 at 12:11 am

    Yeah Irfanview is good in batch processing. Apart from Conversion and renaming functionality it has all the image viewing functions too..

  15. FreeWorld27
    October 18, 2009 at 2:15 pm

    Irfan View is also a good software for batch processing.