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OMNIvour vs Zamzar: an honest comparison
The core difference in one sentence
With any cloud converter — Zamzar included — you have to trust their server with your file. Zamzar has earned that trust over nearly two decades of operation, with encrypted transfers and free-tier files deleted after 24 hours. OMNIvour's on-device lane removes the need to trust anyone at all: the conversion runs locally, and the file never leaves your phone or computer.
Side-by-side comparison
| Feature | OMNIvour | Zamzar |
|---|---|---|
| On-device conversion option | Yes — local lane; the file never leaves your device | No — conversions run on their servers (UK-based) |
| Encryption | Cloud lanes are end-to-end encrypted (AES-256-GCM); on-device lane transfers nothing at all | Encrypted data transfers; check their site for at-rest details |
| AI provider | Self-hosted models run by RADLAB — never a third-party API | Not an AI-conversion product; check their site for current features |
| Free tier / try without signup | Yes — guest mode: one free conversion, no account | Free conversions without an account, with daily count and file-size limits (check their site for current numbers) |
| Formats supported | Images, audio, video, and documents | 1,000+ conversion types, including documents, images, audio, video, ebooks, archives, and CAD |
| File handling & retention | On-device lane: nothing to retain — no upload occurs. Cloud lanes: encrypted, processed on RADLAB-controlled infrastructure | Free-tier files deleted after 24 hours; paid plans include optional longer online storage |
| Platforms | Native iOS, native Android, and web (omnivour.app) | Web, a desktop app on paid plans, and a developer API — check their site for current platforms |
| Price | Free tier + paid plans | Free tier with limits; paid tiers (Basic/Pro/Business) — see their pricing page for current rates |
When Zamzar is the better choice
Zamzar's longevity is real, and so are its strengths:
- The long tail of formats.With 1,000+ conversion types — including CAD, ebooks, and legacy formats — Zamzar covers file types OMNIvour simply doesn't. If you're rescuing a 2003-era file, Zamzar is a strong bet.
- A track record since 2006. Nearly twenty years of continuous operation counts for something. If vendor longevity is part of your decision, Zamzar has more history than almost anyone in this space.
- API and desktop batch workflows. Zamzar offers a developer API and (on paid plans) a desktop app with batch conversion. OMNIvour doesn't target automation.
- Email-based conversion and stored files. Zamzar's paid plans include online storage and workflow conveniences OMNIvour doesn't offer.
Where OMNIvour is the better choice
- Sensitive files. Contracts, medical records, personal photos, voice memos: the on-device lane converts them locally. No server to trust, no retention window, no upload to intercept — because there is no upload.
- Native mobile conversion. OMNIvour ships native iOS and Android apps. Converting on your phone doesn't mean pushing your file through a browser upload.
- AI-assisted conversion without third-party AI. OMNIvour's cloud AI lane runs on RADLAB's own self-hosted models — your file is never sent to a third-party AI API.
- Zero-commitment trial. Guest mode: one free conversion, no signup, no email.
The honest caveat about OMNIvour: its cloud lanes (traditional and AI) still use a server. They're end-to-end encrypted with AES-256-GCM and the AI is self-hosted, but we don't call them “100% private.” Only the on-device lane earns “your file never leaves your device.”
Frequently asked questions
Is Zamzar safe to use?
Zamzar has operated since 2006, encrypts data transfers, and deletes free-tier files after 24 hours — a reasonable record. The consideration is that any cloud converter requires uploading your file to someone else's server.
How long has Zamzar been around compared to OMNIvour?
Zamzar launched in 2006 and is one of the oldest online converters still running. OMNIvour is newer — its differentiator isn't longevity, it's the on-device lane that converts files without any upload at all.
Which supports more formats, OMNIvour or Zamzar?
Zamzar, by a wide margin — 1,000+ conversion types including CAD, ebooks, and legacy formats. OMNIvour covers images, audio, video, and documents: most everyday needs, not the long tail.
Does Zamzar delete my files?
Zamzar states free-tier files are deleted after 24 hours; paid plans can store files longer by choice. With OMNIvour's on-device lane, there's nothing to delete — the file never uploads.
Can I try OMNIvour without an account?
Yes — guest mode gives you one free conversion with no signup at omnivour.app/convert.
Are OMNIvour's cloud lanes 100% private?
No. Cloud-lane files are end-to-end encrypted (AES-256-GCM) and AI runs on RADLAB's self-hosted models — never a third-party API — but a server is still involved. Only the on-device lane means your file never leaves your device.
Try it without signing up
Convert a file for free right now — no account, no email. If it's sensitive, pick the on-device lane and it never leaves your device.
Related: OMNIvour vs CloudConvert · On-device vs cloud conversion
Comparison based on publicly available information as of July 2026. Verify current Zamzar details at zamzar.com. — RADLAB