Online CSV Tools for CSV Lovers
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Cleaning & Preparation
Riparazione Automatica
One-click AI repair for broken CSV structure and encoding.
Pulizia Veloce CSV
Standardize text and format with one click.
Rimuovi Caratteri Invisibili
Removes zero-width spaces and non-breaking spaces that break code.
Cambia Codifica File (Fix UTF-8)
Fix garbled text (mojibake) by converting any text file (CSV, TXT) to the proper UTF-8 encoding.
Unire File CSV
Combine multiple CSV files into one master dataset intelligently.
Filtro Avanzato CSV
Query your CSV like a database using logical operators.
Pulisci e Normalizza
Remove whitespace, empty rows, and duplicates.
Riempi Celle Vuote
Impute missing values using linear interpolation or defaults.
Rinomina Colonne
Bulk rename headers and convert to snake_case for SQL.
Deduplica Intelligente
Remove duplicates based on specific columns and rules.
Deduplica Fuzzy (Similitudine)
Find and merge similar records (e.g. "Jon Doe" vs "John Doe").
Controllo Salute Dati
Audit your dataset for nulls, errors, and type mismatches.
Formattazione Date
Standardize messy dates into ISO-8601 format.
Estrai Righe Uniche
Filter and export only unique values from a list.
Conversion & Export
Convertitore Universale CSV
Convert between Excel (XLS, XLSX), JSON, CSV, and TSV formats instantly in your browser. Free universal file converter that handles large datasets, preserves UTF-8 encoding, auto-detects delimiters, and keeps your data private with local-only processing. No file size limits.
Da PDF a CSV
Extract tables from PDF documents into editable CSV files.
Analysis & Visualization
Creatore Grafici CSV
Create bar, line, and scatter charts from your CSV instantly.
Estrattore Grafici Excel
Extract embedded charts from Excel files and recreate them as interactive visualizations.
Tabella Pivot Online
Summarize data like in Excel but faster and simpler.
Statistiche CSV
Calculate Mean, Median, Mode, and Standard Deviation.
Report EDA Automatico
Generate a full data quality and profile report in one click.
Raggruppa e Aggrega
Group rows by category and calculate sums or averages.
SQL su CSV Online
Run SQL SELECT queries directly on your CSV files.
Matrice di Correlazione
Find relationships between variables (Pearson Correlation).
Conta Valori
Count frequency of unique values in a column.
Confronta CSV (Diff)
Find differences (added/removed rows) between two CSV files.
Rilevatore Schema
Infer data types and structure for SQL CREATE TABLE.
Analisi Testuale
Analyze word frequency and text length distributions.
Transformation & Logic
Convertitore Tipi Dati
Force convert columns to Numbers, Dates, or Text.
Unisci Fogli Excel
Combine multiple Excel sheets into one unified dataset. Supports vertical stacking (append), horizontal joining (merge on common columns), and side-by-side concatenation. Perfect for consolidating monthly reports, regional data, or multi-tab workbooks.
Confronta Fogli Excel
Find differences between Excel sheets with detailed comparison reports. Identify unique rows, changed values, and generate visual diff reports. Perfect for version control, audit trails, data validation, and reconciliation tasks.
Comprimi CSV/XLSX
Reduce file size by zipping CSV and XLSX files.
Elaborazione Batch
Upload multiple CSV/Excel files, clean them all with one preset, and download as a single ZIP.
Colonne Calcolate
Apply math formulas (A + B) to create new data.
Unisci Tabelle (VLOOKUP)
Perform SQL-style joins or VLOOKUP between two files.
Join Approssimato (Fuzzy)
Join tables even when spelling doesn't match perfectly.
Medie Mobili
Smooth out volatile data using rolling windows.
Estrai Email
Scrape all email addresses found in a text file or CSV.
Unpivot (Appiattisci Tabella)
Transform wide data (months as columns) into long format.
Scomposizione Data
Extract Day, Month, Year, and Weekday from dates.
Estrai Caratteristiche Testo
Count words, characters, and extract patterns.
Estrattore Regex
Use Regular Expressions to extract complex patterns.
Mappatura Categorie
Rename or group specific values (e.g., US -> USA).
Validatore Colonne
Check if data meets specific logical rules.
AI & Machine Learning
Chatta con CSV (AI)
Ask questions about your data using AI.
Trasformatore Dati AI
Transform and edit your CSV using natural language commands. AI converts your instructions into code and applies changes instantly.
Strumento Previsioni & Trend
Free online CSV forecasting tool using linear regression.
Clustering K-Means
Group similar data points automatically.
Regressione Lineare
Model the relationship between two variables.
Rilevatore Anomalie (Outlier)
Find data points that don't fit the pattern (Z-Score).
Gestione Anomalie
Cap, remove, or flag anomalies in your dataset.
Normalizzazione Dati
Scale numbers to 0-1 range or standardize them.
One-Hot Encoding
Convert categorical text into binary numbers for ML.
Discretizzazione (Binning)
Group continuous numbers into buckets (e.g. Age groups).
Imputazione Intelligente
Fill missing values based on group averages.
Generatore Scenari
Create "What-if" scenarios by modifying variables.
Aumento Dati
Generate synthetic data samples to expand small datasets.
Platforms
Strumenti Shopify
Complete Shopify toolkit: bulk product editor, multi-store inventory sync, profit calculator, dynamic pricing engine, order anomaly detection, and customer segmentation. Optimize your store operations, prevent overselling, maximize profits, and identify your best customers - all with CSV-based workflows.
Strumenti per Marketing
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. Manage 10-100 clients efficiently with unified analytics.
Strumenti HR
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. Streamline hiring from application to onboarding.
Marketing Formats
Normalizzatore CSV Google Ads
Normalize Google Ads Editor and Google Ads UI bulk export column names into a stable Campaign/AdGroup/Keyword schema.
Normalizzatore CSV Meta Ads
Normalize Meta Ads Manager exports into a stable Campaign/AdSet/Ad schema with spend, reach and CTR columns aligned.
Normalizzatore CSV Mailchimp
Normalize Mailchimp audience/subscriber exports into a stable Email/FirstName/LastName/Tags schema for migration to another platform.
Normalizzatore CSV HubSpot
Normalize HubSpot contact exports into a stable Email/Name/Company/LifecycleStage schema for CRM migration or reporting.
Normalizzatore CSV Klaviyo
Normalize Klaviyo list and segment exports into a stable Email/Name/List/ConsentStatus schema, ready for e-commerce marketing migrations.
Fiscal Compliance
Validatore FatturaPA
Validate a FatturaPA XML e-invoice before sending it to SDI: mandatory fields, Partita IVA and Codice Fiscale checksums, and IVA (VAT) math consistency across every line.
Controllo Partita IVA UE
Bulk-validate EU VAT numbers with real checksum algorithms and flag when cumulative distance sales cross the €10,000 EU-wide OSS/IOSS registration threshold.
Controllo Sales Tax USA e Canada
Aggregate transactions by US state or Canadian province to flag post-Wayfair economic nexus threshold breaches, and audit charged tax against the correct Canadian GST/HST/PST rate.
Controllo Conformità GST India
Validate GSTIN checksums, CGST/SGST/IGST combination logic, HSN/SAC code format, and the ₹5 crore e-invoice (IRN) mandate on a GST invoice export.
Controllo Sequenza Numerazione Fatture
Detect gaps and duplicates in invoice numbering — most tax authorities (SDI, GSTN, and most EU VAT regimes) require sequential, non-repeating invoice numbers within a fiscal year.
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