A Free Alternative to Convertio
Convertio is a capable converter, but larger files need a paid plan. Docultra converts files of up to 10 GB for free, with no account and no daily limit.
Drop your file
Choose the target format
Download the result
Choose file
or drag & drop — images, documents, audio & video
Free · Unlimited · No sign-up · Max 10 GB
Pick a file to auto-detect its format — or choose a format above.
Your privacy is our mission. Most files are converted right in your browser and never leave your device. Only large files, or formats a browser cannot process, are sent to our server over an encrypted connection — they are never stored, never shared, and deleted as soon as your download is ready.
What Is a Good Free Alternative to Convertio?
Docultra covers the same everyday conversions — images, PDF, documents, audio, video — and accepts 10 GB per file without payment or registration. On Convertio, a 1 GB file limit is part of the Lite plan and 10 GB of the Pro plan (pricing page, October 2026). Many Docultra conversions also run in your browser, so the file is not uploaded at all.
File Size Limits Compared
Convertio's figures are those on its pricing page as read in October 2026; check there for current values.
| Service / plan | Price | Account | Max file size | Daily limit |
|---|---|---|---|---|
| Docultra | Free | None | 10 GB | No limit |
| Convertio — free use | Free | Optional | Limited (see its help centre) | Limited |
| Convertio — Lite | Paid | Required | 1 GB | Unlimited minutes |
| Convertio — Basic | Paid | Required | 3 GB | Unlimited minutes |
| Convertio — Pro | Paid | Required | 10 GB | Unlimited minutes |
Where the Two Differ
- Convertio supports more formats overall, including archives, fonts and e-book formats that Docultra does not convert.
- Convertio converts everything on its servers; Docultra converts images, audio, spreadsheets and several PDF operations in your browser.
- Convertio offers an API and cloud-storage imports; Docultra is a website only.
- Docultra has one tier: free, 10 GB per file, no account.
Your Files
Files that go to the server are sent over an encrypted connection, converted and deleted as soon as the download is ready; nothing is kept, shared or used for anything else.
Frequently Asked Questions
Is Docultra really free for large files?
Yes. 10 GB per file, with no account and no payment.
Does Docultra support every format Convertio does?
No. Docultra covers about 50 common image, document, audio and video formats. For archives, fonts, CAD files or rare formats, Convertio has the wider list.
Can I convert several files at once?
Yes. Drop them together; the results download as a ZIP.
Related
Last checked: 2026-10-02