Loading page
Feature checklists make every tool look equivalent. This table leads with the three things that actually differ — what it costs you before it works, whether your files leave your device, and where the free version stops.
| Zamzarzamzar.com | CloudConvertcloudconvert.com | Convertioconvertio.co | Online-Convert Ebook Converterebook.online-convert.com | |
|---|---|---|---|---|
| What it does | The email-me-the-converted-file service from 2006, still converting | Converts between around 200 file formats, including the awkward ones | Drag a file in, pick an output format, download the result | Turns EPUB, MOBI, AZW3 and PDF into whatever your e-reader actually opens |
| What it costs you | Free tierA genuinely usable free tier with paid plans for volume or team features. | Free tierA genuinely usable free tier with paid plans for volume or team features. | Free tierA genuinely usable free tier with paid plans for volume or team features. | Free tierA genuinely usable free tier with paid plans for volume or team features. |
| Your files | Runs on their server | Runs on their server | Runs on their server | Runs on their server |
| Where it stops | Free conversions are capped at a small file size and a couple of files a day before it asks for a plan. | Free use is metered as a daily allowance of conversion minutes, and video burns through it fastest. | Free uploads are capped at 100 MB per file and the free plan limits how many conversions you can run in a day. | Free conversions are capped by file size and a daily count, and DRM-protected books will not convert at all. |
| Best for |
|
|
|
|
| Category | Files & Format Conversion | Files & Format Conversion | Files & Format Conversion | Files & Format Conversion |
| Last checked | 2026-07-29 | 2026-07-29 | 2026-07-29 | 2026-07-29 |
| Open the site | Open | Open | Open | Open |
This comparison is in the address bar — copy the URL to send it to someone.