Ultra-High Quality Converter

     

This is a simple Windows desktop app that turns your photo(s) into a PDF(s) and PDF(s) into a photo(s).

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Think of it like this:

• You pick one or more photos.
• You choose where to save.
• The app makes a PDF (one page per photo).

It tries to keep your photos looking as good as possible.

What you need (easy)

• A Windows PC
• Python installed (if you can run the app, you already have it)
• This project folder (the one that contains:
  • Photo-PDF-Bidirectional-Converter.py
  • requirements.txt
  • zipped venv.rar file)

How to run it

Install the libraries and run

1. Open PowerShell in the project folder

python -m venv venv

.\venv\Scripts\Activate.ps1

2. Install the needed libraries:

pip install -r requirements.txt

3. Start the app:

python -u "Photo-PDF-Bidirectional-Converter.py"

How to use the app

1. Click Add…

   • Select one or many photos.

2. (Optional) Arrange the pages

   • Up / Down changes the page order.
   • Remove deletes selected photos from the list.
   • Clear removes all.
   • Sort A→Z sorts by filename.

3. Choose how you want to save

   • Single PDF (multi-page) = one PDF with many pages.
   • One PDF per photo = many PDF files.

4. Pick where to save

   • Use Browse… to choose the output file/folder.

5. (Optional) Choose “Quality & page sizing”

   • If you don’t know what these mean, you can keep the defaults.

6. Click Convert

   • You will see progress with auto_dip value.
   • Click Cancel if you want to stop.

PDF → Photos (PDF pages to images)

The app can also convert a PDF into photos (one image per page).

1. Click PDF → Photos…
2. Click Add… and choose one or more PDF files
3. Choose an Output folder
4. Pick Render DPI (300 recommended; 600 for extra sharp)
5. Pick Image format:

• png = lossless (bigger files)
• jpg = smaller files (uses JPEG quality setting)

6. Click Convert

Output filenames look like:

• yourpdf_page_001.png, yourpdf_page_002.png, ...

Features (what every button/option really does)

Export

• Single PDF (multi-page)

  • Makes one PDF file.
  • Each photo becomes a page.

• One PDF per photo

  • Makes many PDF files.
  • Each photo becomes its own PDF.

Auto-rotate (EXIF)

Phones often save a photo sideways and also save a “rotate me” note. This option reads that note and fixes the rotation.

DPI (important, but simple)

DPI does NOT magically add detail. It mostly decides how big the photo will be on the PDF page.

Example:

• Same photo + higher DPI = the photo looks physically smaller on the page.
• Same photo + lower DPI = the photo looks physically bigger on the page.

Here is a simple guide:

Use case	Best DPI
Books / PDFs / assignments	300
Notes, handwritten scans	600
Photos (normal print)	300
Diagrams, line art	600
Web / screen only	300 or less

Simple rule:

• If you’re unsure → pick 300 DPI.
• Use 600 DPI only when you know you need extra detail.

Page size modes

• auto_dpi (good default)

  • The app tries to read DPI from your photo.
  • If your photo doesn’t have DPI information, it uses the “DPI (fallback/manual)” box.

• dpi

  • You choose the DPI yourself.
  • Common choices: 300 (good), 600 (very sharp for printing).

• match_pixels

  • Uses the photo pixel size directly as the PDF page size.
  • This can make huge pages for large photos.

• a4 / letter

  • Forces the PDF page to be A4 or Letter.
  • Your photo is fit inside the page.

Embedding (this is the real “quality” choice)

This controls how the photo is put into the PDF.

• jpeg_high (default)

  • The app re-saves the photo as a high-quality JPEG.
  • Good when you want smaller file sizes, but still very high quality.
  • You can change JPEG quality (like 95, 98, 100).

• keep_original

  • Tries to keep the original photo file data without recompressing.
  • Best when your photo is already a nice JPEG/PNG and you want “don’t touch it”.

• lossless_png

  • Converts everything to PNG (no JPEG compression).
  • Biggest PDF files, but very faithful.

Margin (pt)

• Margin is empty space around the photo.
• 0 means edge-to-edge.

PDF metadata

If you turn on Set PDF metadata, you can add:

• Title
• Author

This is like the “name tag” inside the PDF.

“Best quality” guarantee (what the app really does)

The app prefers a library called img2pdf.

• If img2pdf is installed:
  • The app can embed images into PDF in a very high-quality way (often lossless for JPEG/PNG).
• If img2pdf is NOT installed:
  • The app still works, but it uses a fallback method.
  • The app will show a warning so you know.

Supported photo types

Common ones are supported:

• PNG, JPG/JPEG, BMP, GIF, TIF/TIFF, WEBP

Troubleshooting (quick fixes)

1) “PowerShell won’t activate .venv”

Sometimes Windows blocks scripts. Try running PowerShell as Administrator and then:

Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser

Then activate again:

.\.venv\Scripts\Activate.ps1

2) “It says img2pdf is missing”

Run:

pip install -r requirements.txt

2b) “PDF → Photos says PDF engine not installed”

Install dependencies:

pip install -r requirements.txt

(This installs PyMuPDF, which the PDF → Photos feature needs.)

3) “The PDF looks blurry”

Most of the time the photo itself is low resolution. Try:

• Use a better original photo, OR
• Use lossless_png (bigger files), OR
• Use jpeg_high and set JPEG quality to 98–100.

4) “The page size is weird”

Try:

• Set Page size to a4 or letter, OR
• Use dpi and choose 300.

Privacy

This app runs on your computer. It does not upload your photos anywhere.