📊Data Analysis Tool

CSV & Excel
Data Viewer

Professional data visualization and analysis tool. Upload CSV or Excel files, preview data, filter results, and export insights with advanced features.

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Upload Your Data File

Drag & drop or click to upload CSV or Excel files

CSV files (.csv)Excel files (.xlsx, .xls)Up to 50MBFirst worksheet only
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Large File Support

Upload files up to 50MB with optimized parsing for Excel and CSV formats

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Advanced Search & Filters

Global search, column-specific search, individual column filters, and real-time filtering

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Data Visualization

Interactive table with adjustable height, column visibility, row selection, and pagination

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Data Cleaning

Trim spaces, case conversion, duplicate removal, and automated data cleaning operations

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Data Validation

Comprehensive data validation with error detection, email validation, and data quality checks

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Data Sampling

Preview large datasets with configurable sampling for quick analysis and performance

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Find & Replace

Powerful find and replace functionality with undo/redo and regex support

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Bulk Operations

Bulk edit selected rows, column management, and batch data transformations

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Duplicate Detection

Identify and highlight duplicate rows with visual indicators and removal options

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Analytics & Export

Data statistics, summaries, and export to CSV, JSON, and XML formats

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Keyboard Shortcuts

Full keyboard navigation with shortcuts for common operations and productivity

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Undo/Redo System

Complete history tracking with undo/redo functionality for all data operations

Overview

CSV & Excel Viewer — View and Analyze Spreadsheet Data in Your Browser

The CSV & Excel Viewer lets you open spreadsheet files directly in your browser without installing any software. Drop in a CSV or Excel file and instantly see your data in a clean, sortable table with column statistics, pagination, and advanced search. Everything runs inside your browser tab — no file is sent to a server at any point.

Whether you need to audit a data export, explore a report from a colleague, or clean up a dataset before importing it elsewhere, this tool covers the basics and more. You can filter by any column, sort ascending or descending, show or hide columns, find and replace values, detect duplicates, and export the result as CSV, JSON, XML, or Excel — all without a spreadsheet application.

100% freeNo sign-up requiredFiles stay on your deviceSupports CSV, XLSX & XLS
How to use it
  1. 1Drag and drop your CSV, XLSX, or XLS file onto the upload area, or click Choose File to browse.
  2. 2Your data loads into a paginated table. Use the search bar to filter across all columns at once, or switch to Column Search to target one field.
  3. 3Click any column header to sort. Use Quick Actions to run statistics, detect duplicates, validate data, or clean whitespace.
  4. 4When you are ready, pick an export format (CSV, JSON, XML, or Excel) and click the export button to download the result.
Key features
  • Parses CSV and Excel files (XLSX, XLS) up to 50 MB entirely in the browser — nothing is uploaded.
  • Global and per-column search with real-time row filtering.
  • Click-to-sort on any column, with ascending and descending toggle.
  • Show or hide individual columns, and drag column headers to reorder them.
  • Find and replace text across the entire dataset in one step.
  • Duplicate detection highlights repeated rows; one-click removal keeps only the first occurrence.
  • Export filtered or full data as CSV, JSON, XML, or Excel without leaving the page.

Frequently asked questions

Is my data sent to a server?
No. The file is read by your browser's built-in FileReader API and the XLSX library. Processing happens entirely on your device; nothing is transmitted over the network.
What is the maximum file size?
The viewer supports files up to 50 MB. Files larger than that may cause performance issues depending on your browser and device memory.
Can I edit cell values?
You can use Find & Replace to change values across the dataset, and the Bulk Edit mode lets you set a specific column to the same value in all selected rows.
Which Excel sheets are loaded?
Only the first worksheet in the workbook is loaded. If you need data from other sheets, export each sheet as a separate CSV and open them individually.
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Full guide

CSV & Excel Viewer Complete Guide

Learn how to open, filter, sort, and analyze CSV and Excel files without spreadsheet software.

View CSV & Excel files onlineFilter, sort & export dataCommon questions answered

Related Articles & Guides

BlogHow to View CSV & Excel Files Online for FreeHow to View CSV & Excel Files Online for Free Spreadsheet files are everywhere. Data exports from databases, reports from business tools, API downloads, bank stArticleCSV & Excel Viewer: Open Spreadsheets in Your BrowserUpload CSV or Excel files and view them as a sortable, filterable table — no Excel needed.BlogCSV vs XLSX: What's the Difference and When to Use EachCSV and XLSX both show up as "spreadsheet files," but they are fundamentally different things: one is plain text with commas, the other is a zipped bundle of XM