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.RQ file extension

To open .RQ files on Windows, open the .rq file in a plain-text editor to view or edit the query text.

To open a .rq file, use a text editor (it is usually plain-text SPARQL) or execute it with a SPARQL engine such as Apache Jena ARQ. If the file came from an RDF/SPARQL workflow, treat it as a SPARQL query file rather than a generic “data file.”

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Last updated: June 11, 2026 · Reviewed by Julian Stricker

What “reviewed” means on this page
  • Format fit: whether the “what is this file?” description matches common real-world use of the extension, including category, typical MIME types, and aliases.
  • Opening paths: whether Windows / macOS / Linux steps read plausibly for current OS dialogs and default apps; we remove fantasy menus and unsafe shortcuts.
  • Security framing: whether risk notes match the extension class (for example executables vs plain data) and whether affiliate wording does not contradict the security section.
  • Sources and further reading: whether external links point to vendors, standards bodies, or other primary references where possible; we avoid inventing details we cannot ground.
  • Limits: this is clarity and safety-messaging QA, not a guarantee that every statement is exhaustive or that every binary you download is harmless.

Full methodology in the Imprint — The Imprint also states where AI is used and what that does—and does not—replace.

Open on your device

Choose your operating system for a dedicated step-by-step opening guide.

How to open .RQ files

Use these platform-specific instructions to open .RQ files safely.

Windows

  1. Open the .rq file in a plain-text editor to view or edit the query text.
  2. If you want to run it, use a SPARQL tool such as Apache Jena ARQ; ARQ treats a file ending in .rq as a SPARQL query file.
Full Windows guide

Mac

  1. Open the .rq file in a plain-text editor to view or edit the SPARQL query.
  2. To execute the query, run it with a SPARQL engine such as Apache Jena ARQ on your system; .rq is commonly used as the query input.
Full Mac guide

Linux

  1. Open the .rq file in a text editor to inspect or edit the SPARQL query.
  2. Run the query with Apache Jena ARQ command-line tools; ARQ assumes .rq files contain SPARQL queries.
Full Linux guide

iOS

  1. iOS typically treats .rq as a text file; open it in a text/code editor app that can view plain text, or transfer it to a desktop to run it with a SPARQL tool (for example, Apache Jena ARQ).
Full iOS guide

Android

  1. Open the .rq file in a text/code editor app to view or edit the query; to execute it, transfer the file to a desktop SPARQL environment (for example, Apache Jena ARQ).
Full Android guide

Security notes

  • .rq files are usually plain text and typically do not contain “active” content like macros, but they can still be risky if executed in automated pipelines (e.g., queries that are unexpectedly expensive or that access remote endpoints).
  • Be cautious running .rq files from untrusted sources against production endpoints or datasets; a query can cause heavy load (large result sets, complex patterns) or unintended data exposure depending on your environment.
  • If you run .rq queries through command-line tooling (such as Apache Jena ARQ), avoid incorporating untrusted query text into scripts without review, especially when the query targets remote services.

If you did not expect this file

This extension is usually plain data, text, or structured content—not a program by itself. The practical risk is social engineering (a scam attachment or misleading filename). For trusted senders you rarely need heavy-handed antivirus wording; use these tools when you want an extra check on unexpected downloads.

Avast

Avast offers free and premium antivirus software that protects against viruses, malware, ransomware, and phishing. Scan files before opening them to ensure safety.

Norton

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Can't open this file?

These are the most common causes and fixes when .RQ files fail to open.

Common reasons

  • The .rq file opens but shows “gibberish” or unexpected content
  • A SPARQL tool reports syntax errors when running the .rq file
  • Double-clicking does not open the file in the expected app

Fix steps

  1. Confirm the file’s origin (e.g., exported from a SPARQL/RDF tool) and do not assume every .rq file is SPARQL if it came from an unknown application.
  2. Try opening it with a plain-text editor that can detect encodings (UTF-8 is common for SPARQL text).

OS-specific troubleshooting

What is a .RQ file?

An .rq file is commonly a SPARQL query document that contains SPARQL query language syntax (e.g., SELECT/CONSTRUCT/ASK/DESCRIBE queries). The W3C SPARQL Query specification defines the media type as application/sparql-query and recommends the .rq extension for query files. Tools like Apache Jena ARQ assume files ending in .rq are SPARQL queries.

Background

.rq files are widely used in RDF and Linked Data workflows to save SPARQL queries in a reusable, version-controllable form. Because the content is typically plain text, they are often edited alongside code and configuration files and committed to repositories.

Common MIME types: application/sparql-query

Further reading

Authoritative resources for more details on the .RQ format.

Common .RQ issues

The .rq file opens but shows “gibberish” or unexpected content

Most .rq files are plain-text SPARQL queries. If it looks like binary data, it may not actually be a SPARQL query file, or it may be encoded/compressed by another workflow.

  1. Confirm the file’s origin (e.g., exported from a SPARQL/RDF tool) and do not assume every .rq file is SPARQL if it came from an unknown application.
  2. Try opening it with a plain-text editor that can detect encodings (UTF-8 is common for SPARQL text).

A SPARQL tool reports syntax errors when running the .rq file

The query text may not follow the SPARQL Query Language syntax, or it may require prefixes/BASE declarations that are missing.

  1. Validate the query against the SPARQL Query Language specification and ensure required PREFIX and BASE declarations are present.
  2. If using Apache Jena ARQ, keep the query in a .rq file so ARQ recognizes it as a SPARQL query input.

Double-clicking does not open the file in the expected app

The OS may not have a default association for .rq, or it may be associated with a different app on your system.

  1. Open the file from within your text editor or choose “Open with” and select a text editor for viewing/editing.
  2. For running queries, invoke your SPARQL tool (for example, Apache Jena ARQ) and pass the .rq file as the query input.

FAQ

What is the most common meaning of a .rq file?

Most commonly, .rq is a SPARQL query file (a plain-text file containing SPARQL query language). The SPARQL specification recommends .rq for SPARQL query files.

Is .rq the same as an RDF data file?

Usually no. A .rq file is typically a query (instructions to retrieve/construct data), not the RDF data itself.

What MIME/media type is associated with SPARQL query files?

The SPARQL Query specification and the IANA media type registry list the media type as application/sparql-query.

Can I convert a .rq file to another format by renaming it?

No. Renaming only changes the extension. If you need a different representation, you generally export results from your SPARQL tool (e.g., CSV/JSON results), rather than converting the query file itself.

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