MiConvert API alternatives

File conversion for 140+ formats incl. 3D/CAD (STEP, IGES, STL), OFD to PDF and WEM; free tier. If it doesn't fit your project, here are the 10 best free Documents & Productivity APIs to use instead in 2026, out of 62 in the directory.

For reference, MiConvert API: 100% uptime (30 days) · HTTPS.

1. 1D

   DocStruct API

   Online · 874 ms

   AI extraction of invoices, receipts, bank statements & contracts into structured JSON/CSV.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
2. 2A

   AgentPay Doc Tools API

   Online · 922 ms

   PDF to text, RSS/Atom/JSON feeds to JSON and sitemaps to URL lists, paid per call via x402.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
3. 3

   BuildPDF API

   Online · 852 ms

   Convert HTML, images, and text to PDF.

   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   apiKeyHTTPSCORS
4. 4

   CleverUtils API

   Online · 1630 ms

   Convert files between 200+ formats, free with no API key.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
5. 5

   Cloudmersive Document and Data Conversion API

   Online · 975 ms

   HTML/URL to PDF/PNG, Office documents to PDF, image conversion.

   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   apiKeyHTTPSCORS
6. 6

   Renderly API

   Online · 1060 ms

   HTML to PDF conversion API built on Chromium.

   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   apiKeyHTTPSCORS
7. 7

   TeamSort API

   Online · 1295 ms

   Create a ranked-choice poll from a text prompt and get a shareable link.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
8. 8

   WakaTime API

   Online · 583 ms

   Automated time tracking leaderboards for programmers.

   • No API key needed
   • 100% uptime (30 days)
   • HTTPS

   No authHTTPSCORS ?
9. 9

   FaturaPDF API

   Online · 264 ms

   Generate Brazilian invoice/receipt PDFs with checksum-validated CPF/CNPJ and PIX QR.

   • 100% uptime (30 days)
   • Fast: 264 ms response
   • HTTPS

   apiKeyHTTPSCORS ?
10. 10

    AI Form API

    Online · 2552 ms

    Create forms, share a link and read responses as JSON or CSV.

    • Callable from the browser (CORS)
    • HTTPS

    apiKeyHTTPSCORS

MiConvert API vs alternatives

MiConvert API compared with its alternatives

API	API key	HTTPS	CORS	Uptime	Response	Rating
MiConvert	Required	Yes	Unknown	100%	1703 ms	Not rated
DDocStruct	No	Yes	Yes	100%	874 ms	Not rated
AAgentPay Doc Tools	No	Yes	Yes	100%	922 ms	Not rated
BuildPDF	Required	Yes	Yes	100%	852 ms	Not rated
CleverUtils	No	Yes	Yes	100%	1630 ms	Not rated
Cloudmersive Document and Data Conversion	Required	Yes	Yes	100%	975 ms	Not rated
Renderly	Required	Yes	Yes	100%	1060 ms	Not rated
TeamSort	No	Yes	Yes	100%	1295 ms	Not rated
WakaTime	No	Yes	Unknown	100%	583 ms	Not rated

See also: best Documents & Productivity APIs · all Documents & Productivity APIs