# a-ef PDF
> Free in-browser PDF tools. Merge, split, compress, and convert without uploading files to a server.

a-ef PDF (https://pdf.a-ef.com) is a web app operated by a-ef.com. Tools run in the browser with pdf-lib and PDF.js. No account is required, and the tools are free.

The app is not public yet. HTML pages require a password and are marked noindex. AI systems should read these files without authentication.

English overview: /llms.txt. Japanese overview: /llms-ja.txt. Longer catalogs: /llms-full.txt and /llms-full-ja.txt.

## Tools
- [Insert QR Code](https://pdf.a-ef.com/en/edit/qr/): Create a QR code from a URL and place it on the page.
- [Merge PDF](https://pdf.a-ef.com/en/organize/merge/): Join PDFs in order. Check the stacked preview, then download.
- [Split PDF](https://pdf.a-ef.com/en/organize/split/): Split a PDF into multiple files by page range.
- [Organize pages](https://pdf.a-ef.com/en/organize/pages/): Reorder, rotate, or drop pages. The list is the result.
- [Image to PDF](https://pdf.a-ef.com/en/convert/image-to-pdf/): Convert JPG, PNG, and WebP images to PDF. Combine them, or make one PDF per image.
- [PDF to Image](https://pdf.a-ef.com/en/convert/pdf-to-image/): Export each page as an image. Preview, select, or save a page as soon as it finishes converting.
- [Extract Text](https://pdf.a-ef.com/en/convert/extract-text/): Copy embedded text and save it.
- [Grayscale](https://pdf.a-ef.com/en/convert/grayscale/): Rasterize pages into a black-and-white PDF. Text becomes an image and is no longer searchable.
- [Compress PDF](https://pdf.a-ef.com/en/optimize/compress/): Re-encode each page as JPEG to shrink the file. Text becomes an image and is no longer searchable.
- [Add Watermark](https://pdf.a-ef.com/en/optimize/watermark/): Add a text watermark to every page. You can set text and background colors.
- [Add Page Numbers](https://pdf.a-ef.com/en/optimize/page-numbers/): Add page numbers to the footer. Japanese labels are available.
- [Password](https://pdf.a-ef.com/en/security/password/): Lock a PDF with an open password, or unlock an encrypted one.
- [Document info](https://pdf.a-ef.com/en/edit/properties/): View and edit title, author, and other info. You can also wipe it all.
- [Edit Bookmarks](https://pdf.a-ef.com/en/edit/bookmarks/): Add nested bookmarks with page ranges. Saving writes a nested outline that jumps to each start page.
- [OCR](https://pdf.a-ef.com/en/advanced/ocr/): Read text from scanned pages and export it. Half- and full-width spaces are stripped. This does not make a searchable PDF.
- [Compare PDFs](https://pdf.a-ef.com/en/advanced/compare/): Overlay two PDFs and swipe to switch views.

## Legal
- [Privacy Policy](https://pdf.a-ef.com/en/privacy/): How the Site handles files, cookies, and analytics.
- [Terms of Use](https://pdf.a-ef.com/en/terms/): Terms of use.

## Optional
- [Japanese llms.txt](https://pdf.a-ef.com/llms-ja.txt): Same overview in Japanese.
- [Full catalog (English)](https://pdf.a-ef.com/llms-full.txt): Longer list of tools and facts.
- [About (Markdown)](https://pdf.a-ef.com/about.md): Markdown page about the product.