Batch-compress PowerPoint & PDF.
Just drop a whole folder.

Batch-compress up to 1,000 PowerPoint, PDF, Word and Excel files — whole folders at once. Free, no upload.

Drop files or folders here

or

Supported: PDF, PowerPoint, Word, Excel

Up to 100 files / 200MB per file, 1GB total (Large files? Raise the limit)

Your files are never sent anywhere. Everything happens on your device — learn more

Opening and compressing meeting decks, training slides, proposals, and scanned documents one at a time is tedious. With Sveltiq you just drop them all at once — multiple PowerPoint, PDF, Word, and Excel files together. Drop a whole folder and everything inside is compressed while your subfolder structure is preserved, then saved straight back to a ZIP or folder. Up to 100 files, 1GB total. All processing happens on your device, so your files are never sent anywhere.

* Password-protected / encrypted files and legacy formats (.ppt / .doc / .xls) cannot be compressed

“Zipping them together” and “making them smaller” are two different things

When people want to shrink several files, the first idea is often to put them in a ZIP archive — but for PowerPoint and PDF that barely helps. Once you know why, the right way to shrink them becomes clear.

Why a ZIP barely makes them smaller

Inside, pptx, docx, and xlsx files are already ZIP archives, and most images in PDFs are already compressed (JPEG and the like). Wrapping something already compressed in another ZIP changes the size almost not at all. A ZIP is for bundling files into one so they're easy to send — it does nothing to make the contents lighter.

What actually works is compressing the “images” inside

The main reason files get heavy is high-resolution photos, scanned images, and pasted screenshots. Sveltiq opens each file and re-compresses only the images inside, so text and layout stay exactly as they are while the file itself gets smaller. Doing this to many files at once is what “batch compression” means.

Want to send them together? Shrink first, then ZIP

If your goal is to hand someone a whole folder, the order matters. Shrink everything first, then bundle it into a ZIP, and you get both tidiness and a small size. Sveltiq can also save the results as a single ZIP after compression, so this whole flow finishes on one screen.

Three simple steps

  1. Drop folders or files together — drop a whole folder and everything in its subfolders is read automatically. Mixed formats are fine as-is
  2. Compressed automatically, one by one — processing starts the instant you drop, and each file's size reduction appears in the list. There's no transfer wait
  3. Save everything to a ZIP or folder — if you dropped a folder, you can save it with the structure preserved. Your original files are never changed, so you can redo it as many times as you like

The difference for batch compression

Sveltiq Typical online compressors
Batch processingUp to 100 files, whole folders at onceOne file at a time; free tiers often just a few
Folder structureSaved to ZIP / folder with structure preservedDownload one by one and reorganize by hand
Supported formatsPDF, PowerPoint, Word, Excel mixed together OKOften a separate tool per format
Transfer waitZero (there is no upload)Longer as file count and size grow
How files are handledProcessed on your device only (nothing sent out)All files uploaded to a server for processing
Price / limitsCompletely free, unlimited, no sign-upFree tiers often cap count / size or require sign-up
How to verifyWorks with the network off — you can check for yourselfYou can only trust the “we delete it” claim

* This comparison describes common service patterns and does not refer to any specific service. Why Sveltiq can be completely free and unlimited is explained in About (in short: because processing finishes inside your device, there is almost no server cost to run it).

Frequently asked questions about batch compression

Q. How many files can I compress at once?
A. Up to 100 files in one go. The total size is 1GB by default; choosing your PC's memory from the “raise the limit” option in the drop area extends it to as much as 4GB. For more than 100 files, please split them into a few batches.
Q. What happens to my folder structure when I drop a whole folder?
A. Everything in the subfolders is read and compressed automatically. When you save, the folder structure is kept exactly as it was and written out to a ZIP or to your folder, so there's no rearranging afterward.
Q. Is it OK if formats are mixed, like PDF and PowerPoint?
A. No problem. Even with PDF, PowerPoint (.pptx), Word (.docx), and Excel (.xlsx) mixed together, each one is compressed according to its own format. You don't need to switch tools for each format.
Q. How is this different from just putting them in a ZIP?
A. A ZIP only bundles several files into one; PowerPoint and PDF files barely get smaller (their contents are already compressed). Sveltiq re-compresses the images inside each file to make the file itself lighter. If you want to send them together, we recommend compressing first and then choosing ZIP save.
Q. Can I stop partway, or save only some of them?
A. Compression runs one file at a time, and finished files appear in the list as they complete. Even if you close the page partway, your originals are untouched and safe. You can save whenever you like, exporting only the files you need.
Q. Doesn't it get slow with a lot of files?
A. It depends on your device, but unlike server-based tools there is zero upload transfer time, so processing begins the moment you drop the files. Even with many files, there's no waiting for them to “send.”
Q. Is it safe to batch-compress confidential documents?
A. Sveltiq has no upload in the first place. No matter how many files you process together, compression happens entirely inside your browser, and the files are never sent anywhere. You can confirm this yourself — it keeps running even with Wi-Fi turned off (Security).
Q. Are there any formats it doesn't support?
A. Password-protected / encrypted files and legacy formats (.ppt / .doc / .xls) are out of scope. If those are mixed into a batch drop, only the supported files are processed and the rest are left as they are.
Q. What if processing doesn't go well?
A. Please let us know via “Report a bug” near the bottom of the page. Your file contents and file names are not sent — only the technical information needed to investigate, which you can check in a full preview before sending.

Disclaimer — While we do our best to keep this tool working correctly, we cannot guarantee it is free of defects. To the maximum extent permitted by applicable law, the tool is provided "AS IS" and the operator is not liable for damages or losses arising from the use of this site, except in cases of willful misconduct or gross negligence. Please review every output file before using or saving it, and always keep backups of important files. See the Terms of Service for details.