CloudConvert
cloudconvert.com
Converts between around 200 file formats, including the awkward ones
Free tier
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zamzar.com
The email-me-the-converted-file service from 2006, still converting.
Zamzar predates almost every web tool people now reach for, and it still works the same way: upload, choose a target format, collect the result. Its value today is the long tail — legacy office, CAD and ebook formats that newer converters never bothered to support. The free path is deliberately narrow so the paid plans have something to sell.
Questions
A genuinely usable free tier with paid plans for volume or team features. Free conversions are capped at a small file size and a couple of files a day before it asks for a plan.
Yes. Zamzar sends your input to its own servers to process it. That is fine for public material; for anything containing personal data, use one of the on-device tools instead.
Free conversions are capped at a small file size and a couple of files a day before it asks for a plan.
Alternatives
Same category or same task, ordered by how closely they overlap.
cloudconvert.com
Converts between around 200 file formats, including the awkward ones
convertio.co
Drag a file in, pick an output format, download the result
ebook.online-convert.com
Turns EPUB, MOBI, AZW3 and PDF into whatever your e-reader actually opens
pandoc.org
Converts between Markdown, LaTeX, DocBook, reStructuredText and dozens more
convert.town
A pile of one-click converters that never upload the file
svgco.de
Traces a PNG or JPEG into a scalable SVG inside the browser