Forty client invoices, each 3-4 MB, that need to go into a single archive folder under 50 MB. Compressing one by one is a slow afternoon.
Batch compression is the same operation done in parallel. One upload, one set of settings, one download.
Choose consistent settings
Decide on the compression level for the whole batch. For invoices and similar admin documents, High is usually safe — the originals are typically text with minor logos.
Don't try to apply different settings to different files in one batch. Sort first, then run two passes if needed.
Upload and compress
Drop the lot into Flint's compressor. The tool processes them in parallel locally, so the speed is bounded by your machine rather than network.
Download as a ZIP or individually. Each file keeps its original name.
Spot-check the results
Open three or four random files from the compressed batch. Check them at full screen. If quality is acceptable, the whole batch is.
If one looks off, that file probably had different content (a photo-heavy invoice, say). Run that one separately at a lower compression level.
FAQ
How many PDFs can I compress at once?
Browser memory dependent — usually 50-100 files at a time is comfortable. For huge batches, split into smaller groups.
Do I get one merged file or many?
Many — one compressed PDF per input. To get one merged file, run them through merge afterwards.
Can settings vary per file?
Not in a single batch run. Sort first by type, then run each group with appropriate settings.
Will original filenames be preserved?
Yes. Each output keeps its original name. Easy to swap into your existing folders.
Batch compression turns a tedious afternoon into a five-minute job. Drop everything into Flint's compressor and grab a coffee.