Free Online Ebook Converter
Convert EPUB, MOBI, AZW3, PDF and more ebook formats online free
Use our powerful ebook converter to transform digital books between formats instantly. Read your Kindle books on any device or convert EPUB to PDF for universal access. Fast, secure, and free online ebook converter with no software installation required.
Convert Ebooks Online Free
Start converting ebook files right away with our free online ebook converter
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Popular Ebook Conversion Tools
Choose from 23 ebook conversion tools. All conversions are free, secure, and preserve your book's content.
AZW3 to DOCX Converter
Convert AZW3 to DOCX online for free. Fast, secure azw3 to docx conversion with no watermarks or file size limits.
AZW3 to EPUB Converter
Convert AZW3 to EPUB online for free. Transform Kindle books to EPUB format for universal ereaders. Fast AZW3 to EPUB conversion.
AZW3 to MOBI Converter
Convert AZW3 to MOBI online for free. Fast, secure azw3 to mobi conversion with no software needed.
AZW3 to PDF Converter
Convert AZW3 to PDF online for free. Transform Kindle ebooks to PDF for universal reading. Secure AZW3 to PDF conversion.
AZW3 to RTF Converter
Convert AZW3 to RTF online for free. Fast, secure azw3 to rtf conversion with no watermarks or file size limits.
AZW3 to TXT Converter
Convert AZW3 to TXT online for free. Fast, secure azw3 to txt conversion with no watermarks or file size limits.
CBR to PDF Converter
Convert CBR to PDF online for free. Transform comic book RAR archives to PDF format.
CBZ to PDF Converter
Convert CBZ to PDF online for free. Transform comic book ZIP archives to PDF format.
EPUB to AZW3 Converter
Convert EPUB to AZW3 online for free. Fast, secure epub to azw3 conversion with no software needed.
EPUB to DOCX Converter
Convert EPUB to DOCX online for free. Fast, secure epub to docx conversion with no watermarks or file size limits.
EPUB to HTML Converter
Convert EPUB to HTML online for free. Transform ebooks to web-ready HTML format.
EPUB to MOBI Converter
Convert EPUB to MOBI online for free. Transform ebooks to Kindle format. Fast, secure EPUB to MOBI conversion for Amazon devices.
EPUB to PDF Converter
Convert EPUB to PDF online for free. Transform ebooks to PDF format for easy reading and printing. Fast, secure EPUB to PDF conversion.
EPUB to RTF Converter
Convert EPUB to RTF online for free. Fast, secure epub to rtf conversion with no watermarks or file size limits.
EPUB to TXT Converter
Convert EPUB to TXT online for free. Fast, secure epub to txt conversion with no watermarks or file size limits.
MOBI to AZW3 Converter
Convert MOBI to AZW3 online for free. Fast, secure mobi to azw3 conversion with no software needed.
MOBI to DOCX Converter
Convert MOBI to DOCX online for free. Fast, secure mobi to docx conversion with no watermarks or file size limits.
MOBI to EPUB Converter
Convert MOBI to EPUB online for free. Transform Kindle books to EPUB format for other ereaders. Fast MOBI to EPUB conversion.
MOBI to PDF Converter
Convert MOBI to PDF online for free. Transform Kindle ebooks to PDF for easy reading and printing. Secure MOBI to PDF conversion.
MOBI to RTF Converter
Convert MOBI to RTF online for free. Fast, secure mobi to rtf conversion with no watermarks or file size limits.
MOBI to TXT Converter
Convert MOBI to TXT online for free. Fast, secure mobi to txt conversion with no watermarks or file size limits.
PDF to EPUB Converter
Convert PDF to EPUB online for free. Transform PDF documents to ebook format for ereaders. Fast PDF to EPUB conversion.
PDF to MOBI Converter
Convert PDF to MOBI online for free. Transform PDF documents to Kindle format. Fast, secure PDF to MOBI conversion.
Why Use Our Ebook Converter?
Our ebook converter is the ultimate solution for transforming digital books between formats. Whether you need to convert Kindle MOBI to EPUB, transform EPUB to PDF, or convert PDF documents to reflowable ebooks, our online ebook converter handles it all using professional-grade Calibre technology. Break free from device restrictions and read your books anywhere with our free ebook format converter.
Why Convert Ebook Formats?
Ebook format conversion is essential for readers who own multiple devices or want flexibility in how they consume digital content. With our ebook converter, you can read Amazon Kindle books on Kobo or Nook devices by converting MOBI/AZW3 to EPUB, share books as universally readable PDFs, convert fixed-layout PDFs to reflowable EPUB for better mobile reading, and ensure your digital library works across all your devices. Our free online ebook converter gives you complete control over your digital book collection.
Ebook Formats Explained
EPUB
The universal ebook standard. EPUB files are reflowable, meaning text adapts to your screen size. Supported by Kobo, Nook, Apple Books, Google Play Books, and most ereaders except Kindle. The most versatile format for digital books.
MOBI
Amazon's older Kindle format. MOBI files work on all Kindle devices and the Kindle app. Limited formatting compared to newer formats. Convert MOBI to EPUB for non-Kindle devices.
AZW3 (KF8)
Amazon's newer Kindle Format 8 with improved formatting, HTML5, and CSS3 support. Better typography and layout than MOBI. Convert AZW3 to EPUB for universal compatibility.
Fixed-layout format that preserves exact page design. Universal compatibility but not ideal for small screens. Convert PDF to EPUB for better ereader experience.
CBR/CBZ
Comic book archive formats. CBR uses RAR compression while CBZ uses ZIP. Contains sequential images for comics, manga, and graphic novels. Convert between CBR and CBZ for compatibility with different comic readers.
FB2
FictionBook format popular in Russia and Eastern Europe. XML-based with good structure for fiction. Convert to EPUB or MOBI for broader device support and international ereader compatibility.
Features of Our Ebook Converter
- Calibre-powered conversion - Industry-standard ebook conversion technology
- Preserves formatting - Chapters, table of contents, and styling maintained
- Free unlimited conversions - Use our ebook converter as many times as you need
- Kindle to EPUB - Convert Amazon formats for any ereader
- PDF to reflowable EPUB - Transform fixed PDFs to responsive ebooks
- Cover image preservation - Book covers transfer to converted files
- Metadata retention - Author, title, and series information preserved
- No software installation - Convert ebooks online free in your browser
- Secure file handling - Automatic deletion after 24 hours
- Batch conversion - Convert entire book libraries at once (premium)
How to Use Our Online Ebook Converter
Using our ebook converter is incredibly simple. Upload your ebook file (EPUB, MOBI, AZW3, or PDF), select your desired output format, and click convert. Our online ebook converter processes your book using Calibre technology, preserving chapters, formatting, and metadata. Download your converted ebook and transfer it to your preferred reading device. No registration required for basic conversions.
Popular Ebook Conversion Use Cases
- EPUB to PDF:Create printable versions or share books universally
- MOBI to EPUB:Read Kindle books on Kobo, Nook, or any EPUB reader
- PDF to EPUB:Convert documents to reflowable ebooks for mobile reading
- AZW3 to EPUB:Free Kindle Format 8 books from Amazon ecosystem
- EPUB to MOBI:Prepare books for older Kindle devices
- AZW3 to PDF:Create fixed-layout versions of Kindle books
Cross-Platform Reading Made Easy
Stop being locked into one ecosystem. With our ebook converter, you can purchase books from any store and read them on any device. Buy from Amazon and read on Kobo. Purchase from Apple Books and read on Android. Our converter bridges the gap between proprietary formats, giving you true ownership of your digital library. Explore our other conversion tools including document converters, image converters, and audio converters.
Ebook Converter Pricing
Upgrade for larger files, batch processing, and priority support
Basic
- 20 conversions per day
- 500MB file size limit
- 5GB storage cap
- Files stored for 24 hours
- API access (5 req/day)
Bronze
- 50 conversions per day
- 2GB file size limit
- 150GB storage cap
- Files stored for 7 days
- API access (200 req/day)
- Cloud import (Google Drive, Dropbox)
Silver
- 100 conversions per day
- 5GB file size limit
- 250GB storage cap
- Files stored for 15 days
- Full API access (400 req/day)
- Priority queue processing
Gold
- Unlimited conversions
- 10GB file size limit
- 650GB storage cap
- Files stored for 30 days
- Unlimited API access
- Highest queue priority
Frequently Asked Questions
What ebook formats can I convert?
Our ebook converter supports EPUB, MOBI, AZW3 (Kindle Format 8), PDF, CBR, and CBZ formats. Convert between any of these formats to read your books on any device or ereader.
Can I convert Kindle books to EPUB?
Yes! You can convert MOBI and AZW3 Kindle formats to EPUB for reading on non-Kindle ereaders like Kobo, Nook, or any EPUB-compatible device. Note that DRM-protected books cannot be converted.
Is the ebook converter free to use?
Yes! Basic ebook conversion is completely free. Free users can convert files up to 250MB with 10 conversions per day. Premium plans offer larger file sizes up to 10GB and unlimited conversions.
Will converting ebooks preserve formatting?
Our ebook converter uses Calibre technology to preserve text formatting, chapters, table of contents, and embedded images. Complex layouts may vary slightly between formats due to inherent format differences.
Can I convert PDF to EPUB for ereaders?
Yes! Converting PDF to EPUB creates a reflowable ebook that adapts to your screen size, making it much easier to read on ereaders and mobile devices compared to fixed-layout PDFs.
What is the difference between EPUB and MOBI?
EPUB is the universal ebook standard supported by most ereaders (Kobo, Nook, Apple Books). MOBI is Amazon's older Kindle format. AZW3 (KF8) is the newer Kindle format with better formatting support.
Secure Ebook Conversion
Your ebook files are protected with enterprise-grade security
Antivirus Scanning
Every uploaded file is scanned with ClamAV antivirus before processing. Malicious files are automatically rejected to protect our systems and other users.
End-to-End Encryption
All file transfers use TLS 1.3 encryption. Files are encrypted at rest using AES-256 encryption in our secure cloud storage.
Automatic Deletion
Files are automatically deleted after your retention period expires (6 hours to 30 days depending on plan). You can also manually delete files anytime.
Data Anonymization
Non-member conversions use anonymous fingerprints. We never sell or share your data. Metadata is stripped from files during conversion.
GDPR Compliant
Full compliance with GDPR and international data protection regulations. Request data export or deletion anytime from your account settings.
Secure Infrastructure
Hosted on enterprise-grade infrastructure with DDoS protection, WAF, and 24/7 monitoring. Regular security audits and penetration testing.
Ebook Conversion API
Integrate ebook conversion into your applications
RESTful API
Simple, intuitive REST API with JSON responses. Convert files programmatically with just a few lines of code.
API Key Authentication
Secure API key authentication with support for multiple keys. Rotate keys without downtime.
Webhook Notifications
Receive real-time notifications when conversions complete. Configure custom endpoints and retry logic.
Batch Processing
Convert multiple files in a single API call. Track batch progress with detailed status updates.
Async Processing
Submit conversions and poll for status, or use webhooks for notification. Handle large files efficiently.
SDKs & Documentation
Comprehensive API docs with examples in Python, Node.js, and cURL. Interactive API explorer available.
// Convert a file using the API
const response = await fetch('https://converteverything.io/api/v1/convert', {
method: 'POST',
headers: {
'Authorization': 'Bearer YOUR_API_KEY',
'Content-Type': 'multipart/form-data'
},
body: formData // { file, output_format: 'pdf' }
});
const { conversion_id, status } = await response.json();All Supported Formats
Convert between 97+ file formats
98 formats•1,108 possible conversions
Audio
16 formats
High-quality audio conversion with customizable bitrate and sample rate
Video
15 formats
Professional video transcoding with codec selection and resolution control
Image
16 formats
Lossless and lossy image conversion with quality optimization
Camera RAW
7 formats
Convert camera RAW files from Canon, Nikon, Sony, Fuji, and more
Document
15 formats
Convert Word, Excel, PowerPoint, and PDF with preserved formatting
3D Models
7 formats
Professional 3D model conversion for design and manufacturing
Convert Ebooks with AI Assistants
Use our MCP server to convert ebook files directly from Claude, Cursor, and other AI assistants
AI-Native Integration
Built for the Model Context Protocol (MCP). Works seamlessly with Claude, Cursor, and other AI assistants.
Natural Language
Just ask your AI to convert files. No complex commands needed - the MCP handles everything automatically.
Local File Access
Convert files directly from your local filesystem. The AI can read, convert, and save files for you.
Batch Operations
Convert entire folders of files with a single request. Perfect for bulk format migrations.
Fast Processing
Leverages the full ConvertEverything infrastructure. Same speed and quality as our web interface.
API Key Auth
Uses your ConvertEverything API key. All conversions count toward your plan limits.
// Add to your claude_desktop_config.json
{
"mcpServers": {
"converteverything": {
"command": "npx",
"args": ["-y", "@anthropic/mcp-converteverything"],
"env": {
"CONVERTEVERYTHING_API_KEY": "your_api_key"
}
}
}
}Best Free Online Ebook Converter
ConvertEverything.io offers the most comprehensive free online ebook converter available. Our powerful ebook conversion tool uses Calibre technology to transform your digital books between any format while preserving formatting, chapters, and metadata. Whether you need to convert EPUB to MOBI for Kindle, MOBI to EPUB for Kobo, or PDF to EPUB for better mobile reading, our ebook converter handles it all.
Our ebook converter supports all major formats including EPUB, MOBI, AZW3, PDF, CBR, and CBZ. Break free from proprietary ecosystems and read your books on any device. The converter works entirely in your browser with no software installation required, making it the perfect solution for managing your digital book library across multiple platforms and devices.
Ready to Convert Your Ebooks?
Start converting ebook files now with our powerful online converter.
Want even more? Upgrade for larger file sizes, faster processing, and batch conversion.
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