Recoll

Overview

Recoll is a full-text search tool for people who need to find documents across more than one folder, drive, or accessible shared volume. Its breadth of search methods and interfaces suits technically comfortable users who want control over indexing and queries; it is less compelling if you need a consistent feature set across operating systems.

It searches document contents and filenames, including email and OCR-searchable PDFs. You can query an index from a desktop app, browser, command line, or desktop-environment integration.

For a wider category view, browse Desktop Search Software.

Key features

Search and indexing

Boolean queries, exact phrases, proximity searches, wildcards, and filters by file type or directory tree give users more ways to narrow a search than filename matching alone. Recoll indexes many common document formats and compressed files, including email attachments inside nested archives. That makes it useful for collections spread across local files, removable volumes, and shared storage the computer can access.

Indexing can run periodically as a batch job or continuously for real-time updates. The choice is useful for both users who prefer a scheduled refresh and those who need a more current index, though the result still depends on having appropriate text-extraction software for some formats on Linux and macOS.

Interfaces and extension

Recoll offers a Qt desktop GUI, browser-based Web UI, command-line interface, GNOME Shell search provider, KDE KIO, and KRunner integration. The browser interface queries a Recoll index; it is not a substitute for setting one up. A Python 3 extension can query or update that index, and underpins both the Web UI and Joplin notes indexer, making it relevant to users building on Recoll as well as those searching through its ready-made interfaces.

PDF, OCR, and languages

PDF attachments and annotations can be indexed, custom XMP metadata extracted, and image-only PDFs searched through OCR using Tesseract or ABBYY FineReader. OCR broadens coverage to scanned documents, but requires one of those OCR tools. Unicode UTF-8 support covers multiple languages and character sets, and users can select the stemming language at query time.

Pricing

Recoll (Linux and source): 0.00 USD per free. It is free and open source under the GPL, a straightforward fit for Linux users and anyone working from the source code.

Recoll for Windows: custom pricing; a small contribution is requested for the Windows binary download, while the source code is free under the GPL. The Windows port lacks some features, including multithreaded execution, so users who need the fullest feature set should consider another platform. No paid recurring plan or seat-based tier is described.

Platforms

Recoll is available for Linux, macOS, and Windows, and its Web UI provides browser access to an index. Android and API are also named among the platforms. The Windows page says user data stays on the computer and Recoll does not connect to external locations, a useful privacy property for local search. Download files are signed with GPG and checksummed. On Linux and macOS, some formats need external applications or libraries for text extraction, so format coverage can depend on the surrounding software.

Who it's for

Recoll suits people with large or mixed document collections who value content search, deep query controls, archive and email coverage, or OCR for scanned PDFs. It is also a strong fit for users who want scheduled or continuous indexing and multiple ways to access one index. It is a weaker choice for Windows users who need feature parity, or for anyone unwilling to manage extraction dependencies on Linux or macOS.

Pros and cons

• Pros: Search syntax combines Boolean logic, phrases, proximity, and wildcards, with file-type and directory filters for precise queries.
• Pros: Indexing spans common formats, compressed files, nested email attachments, PDFs, and OCR-searchable image-only PDFs.
• Pros: Desktop, browser, command-line, and GNOME/KDE integrations provide several access paths to an index.
• Cons: Windows lacks some features, including multithreaded execution, making it a less complete option there.
• Cons: Some Linux and macOS formats require additional extraction software or libraries, adding setup work.

Alternatives

DocFetcher is another free, open-source desktop search option for Linux, macOS, and Windows; choose it if creating indexes for folders yourself matches your workflow.

Open Semantic Desktop Search is free for Linux, macOS, self-hosted, web, and Windows use, but requires VirtualBox and is supplied as a virtual machine image for one desktop or notebook. It fits users comfortable with that setup.

Precision File Search is a free, open-source alternative for Linux, macOS, and Windows.

DocFinder is a free AGPL-3.0-licensed desktop application for Linux, macOS, web, and Windows.

EasyFind is a free macOS option, with version 5.0.2 requiring OS X El Capitan or later.

Agent Ransack is a Windows-only freemium alternative, with a free Lite edition for personal or commercial use and no support.

Searchmonkey III is a freemium option for Linux, macOS, and Windows, with one-time PDF Extractor at 9.00 USD and Office Documents at 14.00 USD.

Buddi is a free GPLv2 budgeting application, rather than a document-search counterpart.

Verdict

Choose Recoll if you want a free, flexible index for searching documents, email, archives, and scanned PDFs across accessible storage, with several query and access options. Look elsewhere if Windows feature parity matters, or if you want format extraction without extra dependencies on Linux or macOS.