# CloudConvert

> Online file converter supporting EPUB, MOBI, AZW3, PDF, and DOCX, with an API for batch automation and nothing to install.

Source: https://selfpublishingdirectory.com/formatting/cloudconvert
Website: https://cloudconvert.com
Category: Formatting & Layout (https://selfpublishingdirectory.com/formatting)
Pricing: freemium — $0–$8
AI-powered: no
Tags: conversion-tool, freemium, online, no-install, epub, mobi, pdf, api
Last verified: 2026-07-01
Best For: Authors needing a quick one-off ebook conversion, or API-driven batch conversion, without installing software
Formats Supported: epub, mobi, azw3, pdf, docx, html, txt
Platform: web
Tool Type: conversion-tool

CloudConvert is a browser-based file converter with unusually good ebook-format coverage — it handles EPUB, MOBI, AZW3, PDF, and DOCX among hundreds of formats, and uses Calibre under the hood for some ebook conversion paths. For authors who just need a single conversion and don't want to install desktop software, it's fast and frictionless, and its API makes it a fit for automated, batch workflows.

## Why Authors Use It

- **Best for:** Authors who need a quick one-off conversion in the browser, or developers automating conversions through the API
- **No install:** Runs entirely in the browser on any operating system — nothing to download or maintain
- **Strong ebook support:** Converts to and from EPUB, MOBI, AZW3, PDF, DOCX, HTML, and TXT, with options to tune the output
- **Automation-friendly:** A documented REST API and integrations (Zapier, etc.) let you build conversions into a larger pipeline

## Pricing

- **Free tier:** A daily allowance of conversions with no signup required, enough for occasional one-off jobs
- **Paid plans:** Credit- and subscription-based pricing that starts around $8/month and scales with conversion volume; heavy or automated use costs more

## Limitations

- **Privacy tradeoff:** Your manuscript is uploaded to CloudConvert's servers for processing — a real consideration for unpublished work. The company states files are deleted after a few hours, but desktop tools like Calibre, Pandoc, or Sigil keep everything local
- **Costs can add up:** The credit model can get expensive and confusing for high-volume users
- **Not a formatter:** It converts files; it doesn't design or theme your book's interior

## Alternatives

- **Calibre** (free) — the local, private alternative that powers some of CloudConvert's ebook conversions anyway
- **Pandoc** (free) — a scriptable local converter for authors who prefer to keep files off third-party servers