Recoll

Features

• Qt GUI.
• Xapian backend.
• Indexes the contents of many document types: text, HTML, email stores of all kinds, OpenDocument, Microsoft Office and Office Open XML, AbiWord, KWord, Gaim, Lyx, Scribus, PDF, WordPerfect, PostScript, RTF, TeX, DVI, DjVu, MP3 and other audio file formats, JPEG and other image file formats.
• Recursively processes embedded documents to arbitrary depths.
• Query facilities, with boolean searches, wildcards, phrases, proximity, filter on file types and directory tree. GUI Boolean search build tool.
• Xesam query language support.
• Word stemming is performed at query time.
• Multiple indexes selectable at query time.
• Natively based on Unicode. Supports many languages and character sets, including good support for East Asian texts.
• MD5 document hashes for the elimination of duplicates in results.
• Batch and real-time indexing modes.
• Python API.
• GNOME Shell search provider, WEB interface, and Firefox history extensions.

  File type supported

File types indexed natively

• Text.
• Html.
• Maildir, mh, and mailbox. Evolution note: be sure to remove.cache from the skippedNames list in the GUI Indexing preferences/Local Parameters/ pane if you want to index local copies of Imap mail.
• Gaim and purple log files.
• Scribus files.
• Man pages.
• Mimehtml web archive format.
• All the following need Python3:
• Dia diagrams.
• Excel and Powerpoint.
• Tar archives. Tar file indexing is disabled by default, you will need to enable it explicitly, like with the following in your $HOME/.recoll/mimeconf file:

• Zip archives.
• Konqueror webarchive format.

  File types indexed with external helpers

• PDF files.
• MS-Word files.
• Wordperfect files.
• RTF files.
• Image and audio file tags.
• Abiword files.
• Fb2, Epub, and CHM ebooks.
• Kword files.
• Microsoft Office traditional and Open XML files.
• OpenOffice files.
• SVG files.
• Gnumeric files.
• Okular annotations files.
• HWP files.