The word free can be found somewhere near the top of every major converter site. The interesting question is what happens when you reach your third file.
We looked at the pricing pages, FAQs, and terms of use of the five largest converter services and noted precisely where free ends. A bit of disclosure before the numbers: we run FormatFusion, a competing service, so verify every figure against the sources provided. Everything was obtained from the companies' own websites in September 2026.
The limits, from their own pages
| Service | Free file size cap | Free daily meter |
|---|---|---|
| Zamzar | 50 MB | 2 conversions per 24 hours |
| Smallpdf | not stated | 2 tasks per day |
| CloudConvert | 1 GB | 10 credits per day, 5-minute cap per job |
| Convertio | 1 GB in the converter UI, 100 MB in the terms | 10 conversion minutes per 24 hours |
| FreeConvert | 1 GB | 20 conversion minutes per day, 5 per file |
| FormatFusion | 1 GB | none |
A few of those rows are worth examining in more detail.
Zamzar's 50 MB is the lowest limit on the list, and fifty megabytes is not a great amount: a two-minute mobile video, a decent PDF scan, or a small number of RAW photos would be enough to exceed it. The two-file-per-day limit makes it more restrictive still. The paid plans raise the ceiling to 200 MB, 400 MB, or 2 GB, at monthly prices of $12, $19, and $39 respectively.
Convertio states two different limits. The converter page shows 1 GB, while the terms of use continue to state 100 MB for free users. We suspect the user interface reflects the current situation and the terms are behind, but when the generous figure is the marketing and the strict one is the legal document, that indicates which limit to plan around.
Minutes and credits aren't files. The 20 minutes offered by FreeConvert and the 10 minutes at Convertio refer to server processing time, and with CloudConvert it is approximately one credit per conversion minute, some conversion types requiring more. A long video can use up the entire daily allowance in the course of a single file. That's the design: the meter remains unseen until the day it isn't.
Where the limits actually bite
The figures above are merely policies. Trustpilot is where they turn into stories. Reviewers describe reaching the end not before starting the work, but after completing it:
- A Zamzar reviewer converted a file, waited, and then found out the resulting 18 MB file was too large to download for free.
- Another Zamzar reviewer says they uploaded a file, waited through the whole conversion, and were asked to pay at the moment the file was ready.
- Convertio reviewers report the free limit becoming apparent only at the download button.
Giving the situation a fair hearing: these services carry generally high Trustpilot ratings (Convertio 4.9, Smallpdf 4.7, FreeConvert 4.6), so the dissatisfied are a small minority of users. Yet the pattern among that minority is remarkably consistent, and it is always the same wall.
Why the meters exist
None of this is wicked. It's arithmetic. Upload-based converters pay for each second of server CPU time and each gigabyte of bandwidth you use, so free users are a marketing expense, and the meter exists to keep that expense small and to move the heaviest users toward a subscription. Given the way they're built, limits are the only sensible design.
The point of this post is that the architecture is a choice.
Why we don't have a daily meter
FormatFusion converts files directly in your browser. The engines (FFmpeg for media, PDF and image codecs for the rest) are compiled into WebAssembly and run on your own device, meaning your hundredth conversion costs us just as little as your very first: nothing. Which is why there is no daily limit, no conversion minutes, no credits, and no pay-at-the-download surprise on any of our 161 converters. Files up to 1 GB each convert free, three at a time, and those limits are printed right here rather than found at the end.
The same architecture means your files are never uploaded at all, a point we consider even more important than the meter. When a converter's free tier keeps ending your day at file two, the fix isn't a subscription. It's a converter whose costs do not grow with your files, because your files never leave your machine.