Online CSV Tools for CSV Lovers
Analyze, clean, and convert your CSV & Excel data online. No installation, privacy-first. No sign-up required.
Cleaning & Preparation
Auto Repair CSV
One-click AI repair for broken CSV structure and encoding
Quick CSV Cleaner
Standardize text and format with one click
Invisible Character Remover
Removes zero-width spaces and non-breaking spaces that break code
Change File Encoding (UTF-8 Fix)
Fix garbled text (mojibake) by converting any text file (CSV, TXT) to the proper UTF-8 encoding
Merge CSV Files
Combine multiple CSV files into one master dataset intelligently
Advanced CSV Filter
Query your CSV like a database using logical operators
Trim & Sanitize
Remove whitespace, empty rows, and duplicates
Fill Empty Cells
Impute missing values using linear interpolation or defaults
Rename Columns
Bulk rename headers and convert to snake_case for SQL
Smart Deduplication
Remove duplicates based on specific columns and rules
Fuzzy Dedupe
Find and merge similar records (e
Data Health Check
Audit your dataset for nulls, errors, and type mismatches
Date Reformatter
Standardize messy dates into ISO-8601 format
Extract Unique Rows
Filter and export only unique values from a list
Analysis & Visualization
CSV Chart Maker
Create bar, line, and scatter charts from your CSV instantly
Excel Chart Extractor
Extract embedded charts from Excel files and recreate them as interactive visualizations
Online Pivot Table
Summarize data like in Excel but faster and simpler
CSV Statistics
Calculate Mean, Median, Mode, and Standard Deviation
Automated EDA Report
Generate a full data quality and profile report in one click
Group & Aggregate
Group rows by category and calculate sums or averages
SQL Query for CSV
Run SQL SELECT queries directly on your CSV files
Correlation Matrix
Find relationships between variables (Pearson Correlation)
Value Counter
Count frequency of unique values in a column
CSV Compare (Diff)
Find differences (added/removed rows) between two CSV files
Schema Detector
Infer data types and structure for SQL CREATE TABLE
Text Profiler
Analyze word frequency and text length distributions
Transformation & Logic
Data Type Converter
Force convert columns to Numbers, Dates, or Text
Merge Excel Sheets
Combine multiple Excel sheets into one unified dataset
Compare Excel Sheets
Find differences between Excel sheets with detailed comparison reports
Compress CSV/XLSX
Reduce file size by zipping CSV and XLSX files
Calculated Columns
Apply math formulas (A + B) to create new data
Join Tables (VLOOKUP)
Perform SQL-style joins or VLOOKUP between two files
Fuzzy Match Join
Join tables even when spelling doesn't match perfectly
Moving Averages
Smooth out volatile data using rolling windows
Extract Emails
Scrape all email addresses found in a text file or CSV
Unpivot / Melt Table
Transform wide data (months as columns) into long format
Date Decomposition
Extract Day, Month, Year, and Weekday from dates
Text Feature Extractor
Count words, characters, and extract patterns
Regex Extractor
Use Regular Expressions to extract complex patterns
Category Mapper
Rename or group specific values (e
Column Validator
Check if data meets specific logical rules
AI & Machine Learning
Chat with CSV (AI)
Ask questions about your data using AI
AI Data Transformer
Transform and edit your CSV using natural language commands
CSV Forecasting Tool
Free online CSV forecasting tool using linear regression
K-Means Clustering
Group similar data points automatically
Linear Regression
Model the relationship between two variables
Outlier Detector
Find data points that don't fit the pattern (Z-Score)
Manage Outliers
Cap, remove, or flag anomalies in your dataset
Data Normalization
Scale numbers to 0-1 range or standardize them
One-Hot Encoding
Convert categorical text into binary numbers for ML
Data Binning
Group continuous numbers into buckets (e
Smart Imputation
Fill missing values based on group averages
Scenario Builder
Create "What-if" scenarios by modifying variables
Data Augmentation
Generate synthetic data samples to expand small datasets
Platforms
Shopify Tools
Complete Shopify toolkit: bulk product editor, multi-store inventory sync, profit calculator, dynamic pricing engine, order anomaly detection, and customer segmentation
Ads Tools
Complete marketing agency toolkit: multi-platform campaign aggregation (Google Ads, Facebook, LinkedIn), ROI calculator per client, white-label report generator, keyword gap analysis, competitor ad tracking, and AI-powered budget allocation optimizer
HR Tools
Complete HR and recruitment toolkit: resume parser with skill scoring, candidate deduplication using fuzzy matching, salary benchmarking against market rates, diversity & inclusion analytics, interview scheduler optimizer, and automated onboarding checklist generator
Why use HowToCSV for your data?
Managing large CSV files can be challenging on Excel as it often crashes or corrupts formatting. Our online tools let you clean, convert, and analyze data directly in the browser, with no installation needed. Whether you need to convert JSON to CSV or merge two files, you'll find a quick and secure solution here.
Privacy-First Architecture: Unlike cloud-based services that upload your sensitive data to remote servers, HowToCSV processes everything directly in your browser. Your financial records, customer lists, and personal data never leave your device. We can't see your data because we never receive it—it's that simple.
No Installation Required: Forget downloading software, managing licenses, or dealing with updates. Our web-based tools work instantly in any modern browser—Chrome, Firefox, Safari, or Edge. Whether you're on Windows, Mac, or Linux, you get the same powerful features with zero setup time.
Professional-Grade Tools for Free: We've built over 50 specialized tools that rival expensive desktop software like Excel, Tableau, or SPSS. From advanced fuzzy matching and statistical analysis to AI-powered data chat, you get enterprise-level capabilities without the enterprise price tag. Our tools are trusted by data analysts, researchers, business professionals, and students worldwide.
Handles Large Files: Excel chokes on files with 100,000+ rows? Not here. Our optimized algorithms use WebAssembly and web workers to process massive datasets (1GB+) smoothly in your browser. Clean, analyze, and transform millions of rows without crashes or slowdowns.
Built by Data Professionals: Our team includes data engineers, analysts, and developers who understand real-world data challenges. We've designed each tool to solve actual problems we've encountered—from messy encoding issues to complex fuzzy joins. The result? Tools that just work, with intuitive interfaces and smart defaults.
Common CSV Workflows Made Simple
🧹 Data Cleaning Pipeline
Transform messy exports into analysis-ready datasets:
- Upload your raw CSV file
- Use Auto Fix to correct encoding and structure
- Apply Cleaning to remove whitespace and empty rows
- Run Logical Dedupe to eliminate duplicates
- Export your clean dataset
📊 Business Analysis Workflow
From raw sales data to actionable insights:
- Upload your sales/transaction CSV
- Use EDA Report for instant quality assessment
- Create Pivot Tables to summarize by category
- Generate Charts to visualize trends
- Chat with your data using AI Assistant
🔗 Data Integration
Combine data from multiple sources:
- Use Smart Merge to stack multiple files
- Apply Joining (VLOOKUP) to match records
- Try Fuzzy Join for imperfect matches
- Run Dataset Diff to find changes
- Export the unified dataset
🤖 Machine Learning Prep
Prepare data for ML models:
- Check Data Health for quality issues
- Use Fill Missing to handle null values
- Apply Scaling to normalize features
- Run Encoding for categorical variables
- Export for training