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RESO Field Mapper

Upload your MLS field export and instantly map every field to the RESO Data Dictionary standard. No manual lookup — pick your DD version, upload one file, and download a full mapping report.

1 Select RESO Data Dictionary Version

DD 2.0

Current standard — required for RESO Web API certification

✓ Recommended

DD 2.1

Latest release — adds expanded lookup tables & new resources

Latest

DD 1.7

Legacy — for associations still on RETS or older Web API

Legacy

DD 2.0 — 538 standard fields across 12 resources Required for all new RESO Web API certifications. Includes expanded Property, Member, Office, Media, and Lookup resources.

2 Upload Your MLS Field Export

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Drop your field list here or click to browse

Accepts CSV, Excel (.xlsx, .xls) — any file with a column of field names

Which column contains your field names?

3 Your Info (for the report)

Your Name

Organization

RESO Compliance Score DD 2.0

Total Fields

Exact Match

Partial Match

No Match

Field Mapping Results