Ebook Converter
Convert between EPUB, MOBI, AZW, FB2, PDF, RTF, TXT and 20+ other formats. Conversion runs on the server via Calibre — no software needed.
Drop an ebook here or click to browse
EPUB · MOBI · AZW · FB2 · PDF · RTF · TXT · and 20 more formats
Conversion runs on the server via Calibre
Supported input formats
Supported formats
This tool supports 25 input formats and 5 output formats, powered by Calibre's ebook-convert command-line tool.
Output format guide
- EPUB — the open standard. Works on Kobo, Apple Books, Google Play Books, and most non-Kindle readers.
- TXT — plain text, no formatting. Best for pasting into other tools or reading in any editor.
- HTML (stripped) — clean semantic HTML with all calibre classes, inline styles, and wrapper divs removed. Only headings, paragraphs, lists, links, and images remain.
- RTF — Rich Text Format. Opens in Microsoft Word, LibreOffice, and most word processors.
- PDF — fixed-layout document. Note: PDF output requires Calibre with PDF rendering support installed on the server.
File size limit
Maximum upload size is 50 MB. Most ebooks are well under 10 MB. Conversion may take up to 90 seconds for large or complex files.
Related Tools
Ebook Reader
Read EPUB ebooks in your browser. Upload MOBI, AZW, FB2, and 20+ other formats — they convert automatically.
Aspect Ratio Calculator
Calculate width, height, or ratio for any aspect ratio. Useful for scaling responsive images and sizing video embeds.
Meta Tag Generator
Generate complete HTML meta tags for SEO, Open Graph, and Twitter Cards in one form.
SVG to Data URI
Convert SVG files or code to base64 and URL-encoded data URIs for use in CSS and HTML.
Unit Converter
Convert between Length, Weight, Temperature, Area, Volume, Speed, Time, and Digital Storage units instantly.
Timezone Converter
Convert any date and time across 27 major world time zones simultaneously. Handles DST automatically.
Loan Calculator
Calculate monthly loan payments, total interest, and total cost. Includes a 12-month amortization table.
Age Calculator
Calculate exact age in years, months, and days from a birth date. Shows total days, weeks, next birthday, and zodiac sign.
IP Address Lookup
Look up any IP address to find its city, region, country, ISP, timezone, and GPS coordinates. Auto-detects your own IP.
IBAN Validator & Formatter
Validate IBAN bank account numbers online. Checks the checksum, identifies the country code, and extracts the BBAN.
Image Compressor
Compress JPEG, PNG, and WebP images in your browser. Reduce file size without uploading to any server. Batch up to 5 images.
Image Resizer
Resize JPEG, PNG, and WebP images directly in your browser. Maintain aspect ratio, choose output format. No server upload.
Percentage Calculator
Three percentage calculators: find X% of a number, what percentage X is of Y, and calculate percentage change.
Icon Font Generator
Upload SVG icons and generate a complete icon font package — TTF, WOFF, WOFF2, CSS classes, and HTML demo as ZIP.
Icon Font Extractor
Upload any icon font and extract all glyphs as individual SVG files. Optionally load a CSS file to map icon names. Download as ZIP.
QR Code Generator
Generate QR codes from any URL, text, or contact info. Customize size, colors, and error correction. Download as PNG.
Barcode Generator Online — Free SVG Barcode Creator
Generate Code 39 and EAN-13 barcodes online. Download as SVG. Free barcode creator — no sign-up needed.
Online Stopwatch & Countdown Timer — Free
Free online stopwatch with lap times and centisecond precision, plus a countdown timer with presets and browser notification.
Days Between Dates Calculator — Date Difference Online
Calculate the exact number of days between two dates. Shows days, weeks, months, and years. Includes day-of-week for both dates.
Image Metadata Viewer
Upload any image to see file info and EXIF metadata — camera make, model, date taken, GPS location, ISO, aperture, shutter speed.
URL Analyzer
Decompose any URL into its protocol, hostname, port, pathname, query parameters, and hash. Also encode and decode URL components.
Favicon Generator — ICO, PNG & Web Manifest
Generate a complete favicon package from any image — ICO, iOS, Android, Windows tile, web manifest, and more.
Online Image Converter — PNG, JPEG & WebP
Convert images between PNG, JPEG, and WebP formats in your browser. Batch convert and download as ZIP.
PNG to ICO Converter Online — JPG & Image to ICO
Convert PNG, JPG, or any image to ICO format with multiple sizes in a single file. Perfect for favicons and app icons.
PNG to ICNS Converter Online — macOS App Icon
Convert PNG or any image to macOS ICNS format with all standard Apple icon sizes for app development.
Robots.txt Generator
Build a robots.txt file visually. Set crawl rules per bot, add sitemaps, and use common presets.
Font Converter
Convert fonts between WOFF2, WOFF, TTF, EOT, and SVG formats in your browser. Preview the font and download.