Epublys | Online EPUB tools for ebook lovers

# Epublys > Free online EPUB tools. Merge, split, compress, convert, edit, and validate EPUB ebook files — no install, no sign-up. Epublys is a web application at https://epublys.com that provides free browser-based tools for working with EPUB and PDF ebook files. All processing happens in-memory on Cloudflare Workers — no files are stored. ## Tools - [Merge EPUB Files Online](https://epublys.com/merge_epub): Combine multiple EPUB ebooks into one file. Free online EPUB merger - no sign up, no install. Drag, drop, merge. Works on any device. - [Split EPUB by Chapters](https://epublys.com/split_epub): Split any EPUB into individual chapters or a custom range — each piece is a valid EPUB. Download one at a time or as a ZIP. Free, no signup, no Calibre needed. - [Compress EPUB Files](https://epublys.com/compress_epub): Compress EPUB files for Kindle, Kobo, and KDP limits. Free online compressor — strips unused assets, repacks the ZIP, optional in-browser image optimization. - [Convert EPUB to PDF](https://epublys.com/epub_to_pdf): Convert EPUB ebooks to PDF format instantly. Free online EPUB to PDF converter with no watermarks, no limits. Preserves formatting. - [Edit EPUB Metadata](https://epublys.com/edit_epub_metadata): Edit EPUB metadata online. Change title, author, description, language, publisher. Free ebook metadata editor - no software needed. - [EPUB Validator & Checker](https://epublys.com/validate_epub): Free online EPUB checker and validator — no signup. Catch the structural, well-formedness, and reference errors that get books rejected from KDP and Apple Books. - [Convert PDF to EPUB](https://epublys.com/pdf_to_epub): Convert PDF files to EPUB ebook format online. Free PDF to EPUB converter — no sign up, no install. Upload your PDF and download a reflowable EPUB. - [Read EPUB & PDF Online](https://epublys.com/read_ebook): Read EPUB and PDF files directly in your browser. Free online ebook reader with table of contents, themes, font controls

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