PDFStay: A PDF24 Alternative for Local Browser PDF Processing

What this comparison covers

This page answers one specific question: how can you complete a supported everyday PDF task locally in a browser instead of uploading the document to PDF24 Online or installing PDF24 Creator?

It compares processing location, remote transfer, installation, supported-device path, and inspectable evidence for overlapping work. It does not claim that PDFStay replaces PDF24's full free catalog or Windows desktop suite.

Three reasons to choose PDFStay for this job

1. The PDF does not enter a document-server cycle

PDF24 Online says files are transferred to its EU processing servers with encryption and deleted within one hour after processing. Those are meaningful controls, but the document still leaves the device for processing. For supported ordinary tasks, PDFStay removes that transfer step: the browser reads the PDF, performs the operation locally, and downloads the result.

2. Local processing is not tied to a Windows application

PDF24 Creator keeps files local, but its official download supports Windows 10 and 11. PDFStay's supported local path runs in a supported browser instead, so a Mac, Linux computer, phone, or Windows device does not need the Creator installation.

3. The claimed behavior has inspectable records

PDFStay publishes fixed fixture inputs, output bytes, page-count checks, SHA-256 hashes, browser environment, and limitations. That lets you inspect the evidence behind the local-browser workflow rather than relying on an undefined promise.

Which local-processing path matches your device?

Recorded PDFStay compression examples

PDFStay's current compatibility record used fixed, non-sensitive fixtures in Chromium 148 on July 12, 2026:

Text-heavy · standard mode

11,762 bytes became 6,077 bytes, a 48.33% reduction, with the page check remaining 4 → 4.

Image-heavy · image mode

1,845,799 bytes became 337,064 bytes, an 81.74% reduction, with the page check remaining 2 → 2.

Scan-style · scanned mode

2,141,091 bytes became 187,107 bytes, a 91.26% reduction, with the page check remaining 2 → 2.

These are PDFStay examples, not typical-result promises. Compression varies with the source PDF. No document was uploaded to PDF24, so this page makes no same-file speed, size, quality, or reliability comparison.

Inspect the fixture hashes, method, and limitations.

A simple local-browser workflow

1. Open a supported PDFStay tool in the browser.
2. Select a copy of the PDF from the device.
3. Choose the available mode or page operation.
4. Run the task in the current browser session.
5. Download the result and inspect its pages, text, and visual quality before using it.

Try PDFStay Compress PDF. The current free starting point covers one PDF up to 25MB with standard, image, or scanned-PDF mode, and basic small-file use can start without registration.

Who this PDF24 alternative is for

• Mac or Linux users who want supported PDF work to remain local without a Windows-only application.
• Mobile or Windows users who prefer a browser-local task instead of a remote processing service.
• People completing supported compression, merge, split, page-organization, or conversion work.
• Users who value published fixture hashes, page checks, and explicit limitations.
• Anyone willing to inspect the downloaded result on the device before relying on it.

When this narrower alternative is not the right match

PDF24 officially offers a broader free online catalog and a full offline Windows suite. If your task specifically requires OCR, advanced editing, signing, redaction, batch processing, a virtual PDF printer, or another PDF24-only workflow, use the tool that provides it. This page recommends PDFStay for the narrower local-browser processing job; it does not claim identical feature coverage or a lower price than PDF24.

PDFStay's current scope

• Focused tools: PDFStay currently supports fewer functions than PDF24.
• Free boundary: free compression covers one PDF up to 25MB; larger files and advanced settings require Pro.
• Device resources: browser-local processing uses the current device's CPU and memory.
• File-dependent output: compression size and appearance depend on the source PDF.

PDFStay will continue to be updated, but this page counts only live, verified capabilities. It does not present planned work as shipped or promise a release date.

Frequently asked questions

What makes PDFStay a local-browser alternative to PDF24?

For supported tasks, PDFStay keeps ordinary PDF content in the active browser session without requiring the Windows-only PDF24 Creator. PDF24 Online uses processing servers, while Creator provides local processing through a Windows installation.

Does PDFStay upload ordinary PDFs to its servers?

PDFStay's current privacy page says supported ordinary PDF tasks run in the browser session and ordinary PDF content is not uploaded to PDFStay servers.

Can I use PDFStay locally on Mac or Linux?

Yes, for supported tasks in a supported modern browser. The local path is browser-based rather than tied to PDF24 Creator's Windows 10/11 installation.

What can I try without registration?

Basic small-file use can start without registration. Compression currently supports one PDF up to 25MB with standard, image, or scanned-PDF mode.

Does this page claim PDFStay has more tools than PDF24?

No. It compares a narrower job: supported local processing inside a browser without a document-server upload or Windows application. PDF24 has a broader free catalog.

Sources and evidence boundary

• PDFStay Privacy Policy
• PDFStay Compress PDF
• PDFStay fixture records
• PDF24 Tools homepage
• PDF24 FAQ
• PDF24 Compress PDF
• PDF24 Merge PDF
• PDF24 Split PDF
• PDF24 Creator

PDFStay owns this comparison. It combines PDFStay records with observations from the listed official PDF24 pages on July 22, 2026. It is not an independent review, and no same-file PDF24 test was performed.