Supported Conversions
Convert CSV to Excel (.xlsx), JSON, XML, SQL, HTML, Markdown, YAML, PDF, Parquet, and Lua. Available input and output directions depend on the tool.
Browser-local file conversion and cleaning
Free Online CSV ToolsConvert, Clean & Analyze CSV Data Instantly
Free CSV tools online. Convert CSV to Excel, JSON, SQL & XML, edit CSV files, and clean, merge, split & analyze your data with 113 available tools across the site. Connected services may require an account.
Lightning Fast
Process in your browser
Local File Tools
No conversion uploads
No Downloads
Works in browser
What Is CSV Tools Online?
CSV Tools Online provides 113 available data, document and developer tools. File conversion and cleaning run locally in your browser without uploading files. Connected integrations, API requests and published Comet Forms responses use online services and may require sign-in.
Free File Tools
API plans and connected services differ
Privacy First
Local conversion and cleaning
Instant Results
No upload wait times
113 Available Tools
Convert, clean & analyze
Data Cleaning & Analysis
Remove duplicates, trim whitespace, standardize dates & phone numbers, fix capitalization, run SQL queries on CSV files, generate charts, perform statistical analysis, and detect outliers — all without writing code.
Browser-local file conversionNo conversion-file uploadsUpdated on: October 14, 2026Limits depend on the tool and device
Complete CSV Toolkit
Everything you need to work with CSV files. From basic operations to advanced AI-powered tools.
6 Tools Shown
Conversion Tools
Convert your CSV data to and from popular formats with ease.
CSV to Excel
Convert CSV files to Excel (.xlsx) format with formatting
CSV to JSON
Transform CSV data to JSON format for APIs and web apps
CSV to JSONL
Convert CSV to JSON Lines (NDJSON) for ML training, BigQuery, and streaming data
CSV to PDF
Convert CSV files to professional PDF documents with custom formatting
CSV to Parquet
Convert CSV files to high-performance Parquet format for big data analytics and faster processing
CSV to Lua Table
Convert CSV files to Lua table format for game development and scripting applications
+ 32 more tools available
6 Tools Shown
Basic Operations
Essential tools for everyday CSV tasks. Perfect for beginners and quick data manipulation needs.
Remove Duplicates
Instantly detect and remove duplicate rows from your CSV files
Merge CSV Files
Combine multiple CSV files into one with smart column matching
Split CSV
Split large files by rows, size, or column values
Transpose Data
Flip rows and columns to restructure your data layout
Remove Empty Rows/Columns
Clean up your data by removing empty or blank entries
Reorder Columns
Drag and drop to rearrange columns in your preferred order
6 Tools Shown
Formatting & Cleanup
Professional data cleaning tools to standardize and format your data perfectly.
Trim Whitespace
Remove extra spaces and clean up formatting issues
Fix Capitalization
Convert ALL CAPS, lowercase, or inconsistent text to proper case
Standardize Dates
Convert all date formats to a consistent standard format
Standardize Phone Numbers
Format phone numbers consistently across your dataset
Remove Special Characters
Clean up emojis, symbols, and unwanted characters
Auto-detect Data Types
Automatically identify and convert column data types
6 Tools Shown
Data Analysis & Math
Powerful analytical tools to understand and visualize your data insights.
CSV SQL Joiner
Upload multiple CSV files, define join keys, and run SQL queries online to combine your data
SQL Query CSV
Query your CSV data using SQL commands and build interactive dashboards
Group By & Aggregate
Sum, average, count, and group data by categories
Pivot Table Generator
Create dynamic pivot tables for data analysis
Statistical Analysis
Calculate mean, median, mode, standard deviation
Chart Generator
Create bar, line, pie, and scatter charts from your data
+ 2 more tools available
5 Tools Shown
Validation & Quality
Ensure your data meets quality standards with comprehensive validation tools.
Email Validation
Verify email formats and check domain validity
Email Extractor
Extract email addresses from text and files with validation and bulk processing
Phone Number Extractor
Extract phone numbers from text, documents, or URLs quickly and for free
Regex Tester & Extractor
Extract or validate data using regular expressions
Schema Validator
Validate data against predefined schemas and rules
1 Tools Shown
Machine Learning Tools
Build and train machine learning models without coding knowledge.
No-Code ML Model Builder
Build and train machine learning models from CSV data without coding
6 Tools Shown
Developer Tools
Advanced tools for developers and power users who need programmatic control over their data processing workflows.
Mock CSV Generator
Generate realistic test data for development
CSV Comparison Tool
Compare two CSV files and highlight differences
CSV Zip Packager
Package multiple CSV files into organized ZIP archives
Natural Language Query
Query your CSV data using plain English commands
Column Dependency Checker
Analyze relationships and dependencies between columns
Custom Script Runner
Execute custom JavaScript code on your CSV data
3 Tools Shown
Time & Productivity Tools
Tools to help with time management, scheduling, and global coordination.
Global Golden Hours
Find perfect meeting times across time zones with visual overlap detection
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa
URL Query Parameter Editor
Easily edit, add, and remove URL query parameters with visual interface
2 Tools Shown
Random Tools
Entertaining and creative tools for fun projects, testing, and generating random data.
Random Emoji Generator
Generate random emoji combinations for social media, creative projects, and fun activities
Random Phone Numbers
Generate realistic fake phone numbers for testing, development, and privacy protection
6 Tools Shown
General Utilities and Tools
Helpful utility tools for everyday data tasks and calculations.
Advanced CSV Editor
Professional CSV editor with inline editing, advanced filtering, sorting, and data management
JSON Case Converter
Convert JSON property names between camelCase, snake_case, PascalCase, kebab-case, and CONSTANT_CASE
CSV to Report Generator AI
Generate professional reports from CSV data using AI technology
Coming Soon
CSV to Online Database
Convert and host your CSV data as a fully functional online database
Coming Soon
Compress CSV
Reduce CSV file size using compression algorithms for faster transfers
Compress Excel
Reduce XLSX and XLSM file size by shrinking images, pivot caches and empty cells, in your browser
Coming Soon
+ 10 more tools available
1 Tools Shown
Form Builder
Create professional forms, surveys, quizzes, and polls with analytics.
Comet Forms
Comet Forms is a free, no-signup form builder by CSV Tools Online.
REFERENCE DIRECTORIES
Comprehensive Reference Directories
In-depth searchable directories with formulas, commands, examples, and downloadable cheat sheets.
Excel Formula Directory
Comprehensive Excel formula reference and productivity tools.
Search 150+ Excel formulas with syntax, examples, interactive playground, and free cheat sheet download
Git Command Directory
Comprehensive Git command reference and developer utilities.
Search 50+ Git commands with syntax, examples, flags, pro tips, and difficulty levels. Free, no signup.
Popular Extraction & SQL Tools
SQL Query CSV
Query your CSV files using SQL
Execute SQL queries directly on your CSV data with our powerful query engine.
CSV SQL Joiner
Join multiple CSV files with SQL
Combine and join multiple CSV files using SQL JOIN operations with an intuitive interface.
Phone Extractor
Extract phone numbers from text
Extract phone numbers from text and files with international format support.
Email Extractor
Extract email addresses from text
Extract email addresses from text and files with validation and bulk processing.
Why Choose CSV Tools Online?
Built for professionals who value security, speed, and reliability in their data processing workflows.
Local File Processing
File conversion and cleaning happen in your browser without uploading your files.
Lightning Fast
Process CSV files in your browser. Speed depends on your device and dataset.
No Downloads Required
Work directly in your browser. No software installation needed.
Clear Service Boundaries
Connected integrations and hosted forms use online services; local file tools do not.
Multiple Export Formats
Export to CSV, Excel, JSON, SQL, XML, and many more formats.
Mobile Friendly
Use the tools on desktop, tablet, and mobile. Large files may need a desktop browser.
FREQUENTLY ASKED QUESTIONS
CSV Tools — Your Questions Answered
Quick answers to the most common questions about converting, editing, and processing CSV files online.
Upload or paste CSV in the CSV to Excel tool to create a single-sheet .xlsx workbook locally. CSV contains values, not workbook formatting or formulas. Regional settings let you preview date and number formatting. There is no fixed upload-size cap in this converter; available memory and Excel worksheet limits apply.
Use the Advanced CSV Editor to edit cells, sort and filter columns, and export data. Its shared uploader accepts CSV and Excel files up to 55MB. Large files may need a desktop browser.
Use our Merge CSV tool to combine multiple CSV files. Simply upload your files (drag & drop supported), and the tool automatically matches columns by header name. You can choose to merge vertically (append rows) or use SQL JOIN operations with our CSV SQL Joiner for advanced merging by key columns. All processing happens locally in your browser.
Use SQL Query on CSV for SELECT queries against loaded data. For joining multiple files, use Join CSV with SQL. Supported syntax and export options are shown in each tool.
Use Remove Duplicates to identify repeated rows using selected columns and download a cleaned CSV. Large datasets are limited by available browser memory; no processing-speed guarantee applies.
File conversion and cleaning run locally without uploading your files. Connected integrations, API requests and published Comet Forms responses use online services. Local processing is not a GDPR or HIPAA certification; review service details before sharing sensitive data.
Use our JSON to CSV converter: paste your JSON data or upload a .json file, and the tool flattens nested objects and arrays into a clean CSV table. It handles complex nested structures, arrays of objects, and mixed data types. You can customize the delimiter, choose which fields to include, and download the result instantly.
Upload or paste CSV in CSV to JSON, review the generated objects, and copy or download JSON. Use the available output options; ambiguous regional dates and numbers should be reviewed rather than assumed to have been converted.
CSV Tools Online provides multiple data quality tools: Email Validation checks email formats and domains, Schema Validator verifies data against custom rules, Remove Empty Rows/Columns cleans blank entries, Trim Whitespace removes extra spaces, and Fix Capitalization standardizes text casing. Use these tools together for a complete data cleaning workflow.
CSV to SQL generates CREATE TABLE and INSERT statements. It uses VARCHAR(255) columns and escapes apostrophes in string values. It does not generate UPDATE statements or infer a full database schema.
Our free JSON Beautifier tool instantly formats ugly, minified JSON into readable, indented code. Paste or upload your JSON, and it validates syntax, pretty-prints with proper indentation, and provides a tree view for easy navigation. It also supports search, syntax highlighting, and export to .json files — all processed in your browser.
Use our JSON Case Converter to transform JSON property names between camelCase, snake_case, PascalCase, kebab-case, and CONSTANT_CASE instantly. Paste your JSON, select the target naming convention, and the tool converts all keys recursively — including deeply nested objects and arrays. Perfect for API integration and code consistency.
Our YAML Validator tool checks your YAML syntax in real-time and highlights errors with line numbers and descriptions. Simply paste or upload your YAML file, and the tool validates the structure, detects common issues like incorrect indentation or missing colons, and displays a parsed preview. It also supports YAML-to-JSON conversion.
Yes! Our PDF Password Remover lets you unlock secured PDF files directly in your browser. Enter the current password, and the tool removes all restrictions — including print, copy, and edit locks — and generates an unlocked PDF for download. All processing is done locally; your PDF never leaves your device.
CSV Compressor uses GZIP or ZIP to package CSV files locally. Compression is lossless, but the amount of reduction depends on the data; there is no guaranteed percentage.
Excel to CSV can export readable worksheets from supported workbooks. It is not a dedicated corrupted-workbook recovery tool and cannot guarantee that a damaged file will open or recover every cell. Keep the original file and a backup.
Use Advanced CSV Editor to inspect and edit readable CSV data, then export it. Remove Empty Rows and Trim Whitespace can help clean values. Automatic repair of every malformed quote, encoding issue or damaged row is not guaranteed.
Check the delimiter, quoting and text encoding in your CSV, then inspect it in the editor or converter and export a new copy. Keep the original. An unreadable or damaged workbook may need a dedicated recovery application.
Ready to Transform Your Data?
Choose a tool for your next data task. Use free browser tools, or explore the separate API plans for automation.
113
Available Tools
Local
File Conversion
Processed in your browser
Web
No Installation
Use a modern browser