How to compress files and check the results

Reduce supported file sizes while keeping your originals.

1. Keep your originals

Start with copies of your files and choose a separate output location. Keep a backup of important documents.

2. Select supported files

Open File Compressor and add the PDFs, images or supported Office files you want to process. Check the options available for each file type in your installed version.

3. Choose settings for the task

Start with moderate compression. For images and documents, a smaller file can mean reduced image quality. Use a small sample before processing a large batch.

4. Run a small batch

Choose the destination and start compression. Wait for processing to finish before opening the output files.

5. Compare the output

Compare file sizes, then open each sample in its usual application. Inspect text, images, page layout and any important document content. Some files are already compressed and may shrink very little.

6. Keep the version that works

Use the compressed copy only after checking it. If quality is insufficient, use gentler settings or keep the original.