# Excel Tools by gumber.ai

> Free online Excel and CSV tools — merge, split, compare, convert, VLOOKUP, remove duplicates and more. Everything runs in your browser, so files are never uploaded. No sign-up.

Key facts:
- Free hobby project: no sign-up, no paid tier, no watermark.
- 100% client-side: files are processed in the user's browser and never uploaded.
- Supported inputs: XLSX, XLSM, XLSB, XLS, ODS, CSV, TSV, TXT, JSON, digital PDF, PNG/JPG/WEBP images.
- Practical limit: roughly 50 MB / 500,000 rows on a laptop; less on phones. Formatting, charts and macros are not preserved.

## Convert

- [Excel to CSV](https://excel.gumber.ai/excel-to-csv): Convert XLSX/XLS sheets to CSV with your choice of delimiter. Export one sheet or all.
- [CSV to Excel](https://excel.gumber.ai/csv-to-excel): Turn CSV, TSV or delimited text into a proper .xlsx workbook. Auto-detects delimiters and numbers.
- [Excel to JSON](https://excel.gumber.ai/excel-to-json): Convert spreadsheets to JSON arrays or objects. Supports nested keys like "address.city".
- [JSON to Excel](https://excel.gumber.ai/json-to-excel): Paste or upload JSON and get a clean spreadsheet. Nested objects are flattened into columns.
- [PDF to Excel](https://excel.gumber.ai/pdf-to-excel): Extract tables and text from digital PDFs into rows and columns.
- [Image to Excel (OCR)](https://excel.gumber.ai/image-to-excel): Read tables from screenshots, photos or scans and turn them into a spreadsheet.

## Merge & Split

- [Merge Excel Files](https://excel.gumber.ai/merge-excel): Combine multiple workbooks into one sheet or one workbook. Columns are matched by header name.
- [CSV Merger](https://excel.gumber.ai/csv-merger): Join many CSV files into a single CSV, lining up columns by header.
- [Excel Splitter](https://excel.gumber.ai/excel-splitter): Split a workbook by sheet, by row count, into equal parts, or by the values in a column.

## Clean, Compare & Lookup

- [Compare Excel Files](https://excel.gumber.ai/compare-excel): Spot changed cells, added rows and removed rows between two versions of a sheet.
- [Remove Duplicates](https://excel.gumber.ai/remove-duplicates): Find and remove duplicate rows based on all columns or just the ones you pick.
- [Excel VLOOKUP](https://excel.gumber.ai/vlookup): Pull matching values from a second table into your sheet — no formulas, no #REF errors.
- [XLOOKUP / INDEX-MATCH](https://excel.gumber.ai/xlookup): Look up any column in any direction and return one or many result columns.
- [HLOOKUP Tool](https://excel.gumber.ai/hlookup): Lookups for horizontal tables where headers run down the first column.
- [Multi-Criteria Lookup](https://excel.gumber.ai/multi-criteria-lookup): Match rows on two or more columns at once, e.g. Name + Date.
- [Excel Fuzzy Lookup](https://excel.gumber.ai/fuzzy-lookup): Match names that are almost the same — typos, abbreviations and spacing differences.
- [Combine Columns](https://excel.gumber.ai/combine-columns): Join two or more columns into one with any separator — e.g. First + Last name.
- [Mail Merge](https://excel.gumber.ai/mail-merge): Generate personalised letters, emails or messages from a spreadsheet and a template.

## View & Optimize

- [Online Excel Viewer](https://excel.gumber.ai/excel-viewer): Open XLSX, XLS, ODS and CSV files in your browser. Search and browse every sheet.
- [Compress Excel](https://excel.gumber.ai/compress-excel): Shrink bloated XLSX/XLS files by rewriting them with maximum compression.

## Optional

- [About, limitations & disclaimer](https://excel.gumber.ai/about)
- [Full tool documentation for LLMs](https://excel.gumber.ai/llms-full.txt)