Profile
See filled, empty, unique and repeated values for every column before you change anything.
Clean, standardise and deduplicate business data with a clear review trail.
Profile messy CSV files, fix whitespace and text case, convert empty values, remove exact duplicates, and review likely matches before you export. Local cleaning runs entirely in your browser, and every transformation stays visible in an ordered plan.
Local mode never uploadsEvery step is visibleNo fuzzy auto-deleteYour source stays intact
LOCAL CSV CLEANER
Drop messy data. Get a reversible plan.
Your CSV stays in this browser. Start with a file, paste rows, or explore a fictional sample.
OPTIONAL · NO ACCOUNT
Preview cleaning in a temporary Loam workspace.
For a CSV that does not fit the local cleaner, Loam can import it into one private leased Namespace and compute a bounded cleaning preview with ordinary regional APIs.
Uploads directly to LoamExpires after 24 hoursAccess lost on refresh10,000 rows / 16 MiB query cap
Checking temporary workspace availability…
Build a plan
Add precise cleanup rules in a visible order. Undo the latest step or reset the plan at any time.
Review and export
Compare the preview, inspect fuzzy-match suggestions, and download a new CSV only when you are ready.
Choose the right way to clean your data
Local mode: clean, profile, standardise, deduplicate, review and export a complete CSV in this browser. File contents are not uploaded.
Temporary Loam: explicitly upload to a private Namespace that expires. Preview lowercase, uppercase and exact-deduplication plans within the stated query limits.
Governed Loam: open Loam or use its existing Claude connector to create source-preserving cleaned views under your workspace permissions.
Solve a specific data quality problem
Transparent AI data cleaningAutomate rules while keeping ambiguous decisions human.CSV data cleanerClean a CSV locally without uploading it.Record deduplicationRemove exact duplicates and review possible matches.Data profilingMeasure missing, unique and repeated values.Data qualityCheck quality before and after each step.Data wranglingTurn messy values into a repeatable plan.HubSpot exportsPrepare exported CRM records for review.Salesforce exportsClean exported accounts and contacts carefully.Google Sheets duplicatesReview duplicates through a CSV workflow.Data cleaning with ClaudeUse Loam's existing connector for governed data.