HyperCompress

Compress PDF and PowerPoint, and convert files — right in the browser

Shrinks PDF and PowerPoint files to the size you need and converts audio, video, images, documents, archives and e-books between formats. Everything runs offline, inside the browser.

Add to your browser

Chrome Yandex Edge Opera

Free · No sign-up · Works offline

Price: Free
Data sent out: No
Browsers: Chrome, Yandex Browser, Edge, Opera
Version: 1.4.0
Size: 12.26 MB
Interface languages: English, Russian
Category: Tools

Mail servers usually reject attachments above 10–25 MB, and a deck full of photographs easily hits a hundred. Online compressors and converters solve that by uploading your file to someone else's server — which for internal material is often simply not allowed.

HyperCompress does both jobs inside the browser. When compressing, rather than re-encoding the whole document, it finds the raster images inside it — normally responsible for about 90% of the weight — and rewrites those, leaving text, fonts, vectors and structure untouched.

The second mode is conversion. The extension moves audio and video, images, documents, archives and e-books from one format to another, so a one-off job needs neither a separate program nor a trip to an online service.

What it does HyperCompress

Fit-under-limit mode

Set a target size, 20 MB by default, and the extension picks settings that get the file under it.

Maximum compression mode

Aggressive processing: images capped at 1280 px, JPEG quality 55 — for when only the size matters.

PPTX with its design intact

Images are decoded, downscaled and re-encoded while transparency, layouts, text, fonts, charts, animations and metadata all stay in place.

PDF with text preserved

Only embedded images are rewritten; selectable text, vectors, fonts, links and bookmarks are left alone.

Audio and video

Sound converts to MP3, WAV, FLAC and OGG, video to MP4, AVI, MOV and MKV. WEBM files are accepted as input.

Images

JPG, PNG, WEBP and GIF convert in any direction — handy for turning photographs into WEBP to lighten a web page.

Documents

PDF, DOCX, ODT, RTF, Markdown and PPTX: Word to PDF, Markdown to DOCX and other combinations, with no office suite installed.

Archives and e-books

ZIP, 7Z, TAR and TAR.GZ repack between each other and RAR is read as input. EPUB and FB2 convert into one another, and out to PDF or DOCX.

Batch processing and a report

Several files go through in one pass, and each one shows its size before and after and where the change came from.

Honest warnings

Password-protected documents are rejected and legacy .ppt files are detected and flagged — no silent failures.

How to use it

Click the HyperCompress icon and drag your files into the window, or pick them with the Upload files button.
To compress, choose a mode — fit under a size you set, or maximum compression — and press Compress.
To convert, pick a format group (audio and video, images, documents, archives, e-books), choose the output format and press Convert.
Save the result. Your original files are not modified.

Who it is for

Send a deck through corporate email without splitting it up
Shrink a batch of reports before dropping them in a shared folder
Turn a Word document into a PDF when no office suite is installed
Re-encode photographs as WEBP so a web page loads faster
Open an FB2 or EPUB book on a device that only understands PDF
Compress and convert documents with internal data that must not touch online services

How to install

Find the extension you need and press Install
The right Chrome Web Store page opens in your browser.
Press Install on the Chrome Web Store page
A blue Install button appears on the right of the listing — click it. If the page opened in a different browser (Safari, say), copy its address into Chrome, Yandex Browser, Edge or Opera and press the button there.
Pin the icon to the toolbar
Open the extensions list in your browser settings and pin the new extension to the toolbar.
Done — open the extension
Click its icon in the browser. No account, no payment, no setup needed.

All four browsers (Chrome, Yandex Browser, Microsoft Edge, Opera) are built on the Chromium platform, so extensions for them all come from one place — the Chrome Web Store. Chrome and Yandex Browser open the listing directly. Edge asks once for permission to install from other stores — choose “Allow”. Opera needs the free Install Chrome Extensions add-on, after which the install button appears on the normal listing page.

Add to your browser

Chrome Yandex Edge Opera

Free · No sign-up · Works offline

Frequently asked questions

Which formats can the extension convert?

Audio and video — MP3, WAV, FLAC, OGG, MP4, AVI, MOV, MKV (WEBM is read as input); images — JPG, PNG, WEBP, GIF; documents — PDF, DOCX, ODT, RTF, Markdown, PPTX; archives — ZIP, 7Z, TAR, TAR.GZ (RAR is read as input); e-books — EPUB and FB2, including output to PDF or DOCX.

How much smaller does the file get?

It depends on the content: photo-heavy decks often shrink several times over, while text-and-vector documents barely change because there is little to compress.

Does it ruin the presentation's design?

No. Only raster images change; layouts, text, fonts, charts, animations and metadata are preserved as-is.

Is the file sent to the cloud?

No. Not a single network request — both compression and conversion happen entirely in the browser and no account is required.

Is the old .ppt format supported?

No, only .pptx. Legacy files are detected and flagged so you can re-save them in PowerPoint.

What about password-protected PDFs?

They are rejected: rewriting the contents requires the document to be decrypted first.

How is this different from zipping the file?

ZIP barely shrinks PDF and PPTX because their contents are already compressed. HyperCompress shrinks the images themselves, which is where the real savings are.

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