Merge two CSV files on a common column. Join datasets horizontally by matching key values, like a SQL JOIN for your spreadsheets. Everything runs locally in your browser — nothing is uploaded.
Remove duplicate rows from CSV data based on a specific column. Keep only unique values for cleaner datasets.
Generate SQL INSERT statements from CSV data. Specify a table name and get executable SQL for database import.
21 CSV tools (extract, rename, clean, dedup, validate, merge, pivot, filter, sort, split, stats, transpose + exports to HTML/MD/NDJSON/SQL/TSV/Excel), 14 JSON tools (diff, flatten, escape, path finder, schema generator, size analyzer, TypeScript/Zod generators, JWK, JSONL, NDJSON), data converters (JSON↔YAML/XML/TOML/URL/CSV), and data generators (UUID, hex, base64, names, emails, phones, dates, IPs, CSV/JSON rows).
Upload CSV files and run SQL queries in your browser. Auto-creates tables from CSV headers, execute SELECT/INSERT/UPDATE/DELETE queries, export results. All processing stays on your device with zero uploads.
Convert messy CSV or Excel sheets from clients into clean JSON in one batch. Handles missing values, nested rows, and generates strict JSON schemas for 50+ files at once.
CSV Merger lets you merge two CSV files on a common column. Join datasets horizontally by matching key values, like a SQL JOIN for your spreadsheets. Everything runs locally in your browser — nothing is uploaded.. It works on any device with a modern web browser.
Merge two CSV files on a common column. Join datasets horizontally by matching key values, like a SQL JOIN for your spreadsheets. Everything runs locally in your browser — nothing is uploaded. It's ideal for developers, designers, and anyone who needs to merge two csv files on a common column without installing software or sending data to external servers.
Direct text entry, file upload, or URL-based input — depending on the tool. Paste or type your content directly into the provided editor area.
Yes. After the initial page load, CSV Merger runs entirely on your device with no internet connection needed. All processing is done locally.
Yes, this tool is completely free. No credit card or registration is required for standard usage.
All processing happens 100% locally in your browser. Your data is never uploaded to any server.
Yes. Once the page has loaded, the tool runs entirely offline without requiring an internet connection.
Standard tools are unlimited. Pro tools allow free daily usage with an option to upgrade.
Any modern web browser (Chrome, Firefox, Safari, Edge) on desktop or mobile. No installation needed.
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