Smallpdf alternative

The Smallpdf alternative that never uploads your files.

Q: Can I redact a PDF automatically instead of by hand?

Smallpdf's redaction is manual. KeptPDF auto-detects PII such as names, SSNs, account numbers and dates on-device, pre-marks it for review, destroys the underlying content, and exports a SHA-256 audit certificate of exactly what was removed.

Q: Is Smallpdf safe?

For everyday documents Smallpdf has solid baseline security: TLS encryption, EU data residency, ISO/IEC 27001 certification and automatic deletion. The residual risk is structural: your file is briefly on a third party's servers. For sensitive material, an on-device tool removes that risk because the file is never uploaded.

Smallpdf uploads your document to its servers and deletes it an hour later. KeptPDF has no server to upload to. Every tool runs inside your browser. Open the network tab and watch: your file never appears in a single request.

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Credit where it's due.

Smallpdf is a polished, ISO 27001-certified product with a huge catalog of conversions. For most everyday PDFs it's perfectly fine. This page is about the one architectural difference that matters when the document is sensitive.

The difference in one sentence

With Smallpdf, your file is uploaded to a remote server, processed there, and deleted within an hour. With KeptPDF, the file is never uploaded at all. Nothing sits on a server to delete, breach, subpoena, or retain.

Smallpdf encrypts files in transit, stores them in the EU, and removes them within one hour of processing, which is a reasonable policy. But for a contract, a medical record, a financial statement, or anything under professional secrecy, the model itself is the exposure: every file you process briefly lives on someone else's infrastructure. KeptPDF removes that step entirely.

KeptPDF vs Smallpdf

Same tasks, a different exposure profile, and a redaction tool built for people with real liability.

Capability	KeptPDF	Smallpdf
Files are processed in your browser, never uploaded
You can verify zero uploads yourself by watching the network tab
Redaction auto-detects names, SSNs & emails, not just manual boxes
Redaction ships a verifiable SHA-256 audit certificate
Redaction permanently removes the underlying content
Bates numbering with CSV load file & production report
Bulk-process many PDFs at once, all in your browser
Every tool free, no account or sign-up required
Works offline once the page has loaded
ISO/IEC 27001 certified, established enterprise compliance program
Large catalog of file-format conversions (Word, Excel, PPT, JPG…)

✓ yes · – partial · ✗ no. Marks reflect each product's default web workflow as of June 2026, per each product's own site and trust center. Smallpdf uploads files over TLS to its servers (EU region) and deletes them within one hour; its redaction permanently removes content but must be applied manually, with no automatic detection and no audit certificate. Smallpdf is genuinely strong where we mark it: it is ISO/IEC 27001 certified and offers a far larger catalog of file-conversion formats. KeptPDF processes everything in your browser, so there is no upload to delete.

When Smallpdf is the better pick, honestly.

We'd rather you choose the right tool than oversell ours.

Heavy format conversion

If you convert PDFs to and from Word, Excel and PowerPoint all day, Smallpdf's catalog is broader. KeptPDF does images, OCR and table extraction to Excel, not full Office round-tripping.

A named certification on file

Need to point procurement at an existing ISO/IEC 27001 certificate today? Smallpdf has one. We don't carry formal certifications.

Cloud document storage

Want a synced "document hub" you can reach from any device? Smallpdf stores files for you. KeptPDF deliberately keeps everything local: your recent-files list never leaves your browser, on any plan.

Where KeptPDF pulls ahead: redaction you can defend.

This is the reason most people switch.

Automatic PII detection

Smallpdf makes you find and box every SSN, name and account number by hand. KeptPDF scans the document on-device and pre-marks them for you, then you confirm. Far less to miss.

A SHA-256 audit certificate

Every redaction exports a verifiable certificate showing the input and output document hashes, exactly what categories were removed, and the safety mode used: defensible proof the file was sanitized, for your compliance and client records.

It works on your phone

Auto-detect and redact PII straight from a mobile browser, with no desktop, no app install, and still nothing uploaded. Useful when a sensitive file lands in your inbox on the go.

Before you send a file to opposing counsel, a partner firm, a client, or an AI assistant, clean it where it already is, in your browser.

Switching from Smallpdf

Nothing to import or migrate. There's no account or cloud library to move, just open a file and go.

1 · Open your file

Drop a PDF onto the page. It loads straight into your browser, with no upload step and no waiting room.

2 · Work on it privately

Redact, sign, OCR, Bates, compress, merge: every change happens on your device. Your file is never sent anywhere.

3 · Download the result

Save your finished PDF. The original never left your device, and neither did the copy.

Smallpdf alternative: FAQ

Does Smallpdf upload and store my files?

Yes. Smallpdf uploads your file over an encrypted connection to its servers in the EU, processes it there, and deletes it within one hour (or when you remove it from its document storage). It's a reasonable, GDPR-compliant policy, but the file does leave your device. KeptPDF never uploads it in the first place, so there is nothing on a server to retain or delete.

What is the most private Smallpdf alternative?

KeptPDF runs entirely in your browser, so your document is never uploaded anywhere. Open developer tools, watch the Network tab, and run any tool: your file never appears in a request. The only calls are tiny first-party pings (the tool's name, whether you're signed in) that never contain it. Once the page has loaded, tools keep working if the connection drops (OCR downloads its engine on first use).

Can I redact a PDF automatically instead of by hand?

Smallpdf's redaction is manual: you highlight everything yourself. KeptPDF auto-detects PII (names, SSNs, account numbers, dates and more) on-device and pre-marks it for your review, then destroys the underlying content and exports a SHA-256 audit certificate of exactly what was removed.

Is KeptPDF free, and do I need an account?

All 25 tools are free with no account, with files up to 25 MB and no daily limit. Pro ($29/month) removes the watermark, lifts the size cap (~500 MB practical limit), and adds PDF and JSON audit certificates, Bates load files, and unlimited bulk.

Is Smallpdf safe?

For everyday documents, Smallpdf has solid baseline security: TLS encryption, EU data residency, ISO/IEC 27001 certification and automatic deletion. The residual risk is structural: your file is briefly on a third party's servers. For privileged, regulated or otherwise sensitive material, an on-device tool removes that risk entirely because the file is never uploaded.

Comparing other tools? See KeptPDF vs Adobe Acrobat and KeptPDF vs iLovePDF.

Try the redaction Smallpdf can't do, without uploading a thing.

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