What is the RLF file format?
.rlf is the report layout file format used by ArcMap, the desktop GIS application at the core of Esri's ArcGIS Desktop suite. It stores a complete report template created in ArcMap's built-in Report Designer, including page layout settings (margins, headers, footers), data source bindings, field definitions, column formatting rules, and grouping or sorting configuration.
The format is proprietary binary and tied to ArcMap 9.x through 10.8.x. A companion format, .rdf, stores actual report output data, while .rlf holds only the reusable template definition.
A critical compatibility note: .rlf files have no migration path to ArcGIS Pro, Esri's current GIS platform. Esri has confirmed that ArcMap reports cannot be imported into ArcGIS Pro, which uses its own .rptx-based report system. As ArcMap moved into maintenance-only status and is being phased out, .rlf files face long-term obsolescence. Organizations still relying on ArcMap report templates should plan to rebuild them natively in ArcGIS Pro before ArcMap support ends.
Typical file sizes range from a few kilobytes to several hundred kilobytes depending on report complexity. The format uses little-endian binary encoding with no documented compression or encryption, and is supported on Windows only.
Security & safety
RISK: LOWPassive layout template file with no executable code. No security risk. Main concern is format obsolescence as ArcMap is retired.
Format details
in a nutshell- RichLink Author compiled help file - RichLink Author (legacy help authoring tool) used .rlf for compiled rich-link help documents; entirely unrelated to Esri.
Programs that open RLF files
Windows1 app
ArcMap (ArcGIS Desktop 10.x)
Paid In ArcMap: View menu > Reports > Load Report Layout, select the .rlf file. Requires ArcGIS Desktop license. Technical details
deep spec| Developer | Esri (Environmental Systems Research Institute) |
| Application | ArcMap (ArcGIS Desktop 9.x - 10.8.x) |
| Encoding | Binary (little-endian) |
| Compression | Proprietary binary; no compression layer documented |
| Typical file size | 10 KB - 500 KB |
| Template stores | Page layout, field definitions, data source bindings, grouping and sorting rules |
| ArcGIS Pro compatibility | Not supported - Esri confirmed no migration path from ArcMap reports to ArcGIS Pro |
| Companion format | .rdf (report output/data file) |
| Related formats | .mxd (ArcMap map document), .mxt (ArcMap map template) |
| Platform | Windows |
| Status | Maintenance-only; ArcMap being phased out by Esri in favour of ArcGIS Pro |
| Released | ~2000s (ArcGIS Desktop / ArcMap era) |
| Latest version | ArcMap 10.8.x (last ArcMap release) |
| Specification | desktop.arcgis.com |
RLF conversions
Community Q&A
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