A batch image processing program in Python: resize, convert, rename and watermark a whole folder of pictures

Example result

def update_total(self, *_):
    """Adds up the lines and the tax and shows the total under the table."""
    subtotal = sum(line.hours * line.rate for line in self.lines)
    tax = round(subtotal * self.tax_rate.get() / 100, 2)
    self.subtotal_label.config(text=f"Subtotal: {subtotal:,.2f}")
    self.tax_label.config(text=f"Tax: {tax:,.2f}")
    self.total_label.config(text=f"Total: {subtotal + tax:,.2f}")

About this service

Shops, photographers, bloggers and offices often need the same thing done to dozens of pictures: made smaller for a site, turned into JPEG or WebP, renamed in order, given a watermark or cropped to a square. This program does it for a whole folder from one window: pick the folder, choose the actions, look at a preview of one picture and press Start. New files go to a separate folder, so your originals stay untouched. From Standard your presets are saved; in Premium you get more actions, a report of what was done and an error log. We write it in Python with Tkinter and Pillow, a common picture library that the README shows how to install. It does not retouch, remove backgrounds or change what is in the pictures, and it uploads nothing anywhere.

What is included

• What you getA ZIP archive with the Python code, a README on installing Python and Pillow, running the program and building an .exe, and an example presets file; the code is also shown on the order page. From Standard, presets saved to a settings file; in Premium, a report exported to a file and an error log.
• Whole folder at onceDozens or hundreds of pictures
• Originals keptResults go to a new folder
• Common actionsResize, convert, rename, watermark, crop
• Saved presetsYour sizes and formats, from Standard
• OfflineNothing is uploaded anywhere

How it works

1. 1
   TaskYou list the actions, sizes and naming
2. 2
   CodeWe write the program and the README
3. 3
   Try itYou run it on a copy of a folder
4. 4
   ChangesYou ask for changes within your package and send any error message

What we need from you

Which actions you need and their settings: sizes in pixels, formats (JPEG, PNG, WebP), quality, how files should be named, the watermark text or your PNG logo and where it goes, what to do with pictures of a different shape. One or two sample pictures help. Your system (Windows, macOS or Linux) and whether you want an .exe.

We will ask you:

• What should happen to the pictures?
• Naming
• Watermark
• Your usual pictures
• Which system will it run on?

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Questions and answers

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