What it does
MiConv converts documents, spreadsheets, media, ebooks, archives, fonts, CAD, 3D, and GIS files in a browser. It supports multi-file conversion and publishes its current upload allowances.
A batch of small files can be selected together and converted to a common target. The service's stated 75 MB per-file limit matters for audio, video, and model data, while its 120-files-per-hour allowance matters for a large folder. Those constraints make it worth sorting the files by size before beginning rather than discovering midway that part of the batch needs a different route.
MiConv performs the job online and returns a downloadable file. Its FAQ says inputs are removed after conversion, outputs after two hours, and output access is tied to the initiating IP address. That may matter if a mobile connection changes before the result is downloaded. These are the service's stated handling rules, not an independent privacy assessment.
Strengths
- Publishes both per-file and hourly allowances on the homepage.
Watch out for
- The reviewed FAQ caps files at 75 MB and conversions at 120 files per hour.
Best for
- Small batches spanning several file types
Sources
- MiConv – Free Online File Converter for Any Format (Oct 26, 2026)