Process CSV and JSON in your browser

Convert, split, merge, and inspect CSV and JSON without uploading files. Everything runs locally on your device—fast, private, no account required.

Data conversion and processing

Data Conversion and Processing Tools

These tools help you quickly work with common data formats like CSV and JSON. Whether you are cleaning up spreadsheet exports, transforming API responses, or preparing data for analysis, TinyDataTool provides simple browser-based utilities that make these tasks fast and easy.

All conversions happen locally in your browser, so your data never leaves your device.

CSV tools online

CSV Tools

Split CSV

Break a large CSV file into smaller files with a fixed number of rows.

 Merge CSV

Combine multiple CSV files into a single CSV file.

 CSV Diff

Compare two CSVs by a key column: added, removed, and changed rows. Private, in your browser.

 CSV to TSV

Convert comma-separated CSV files into tab-separated format.

 TSV to CSV

Convert tab-separated TSV files into comma-separated CSV format.

 CSV Column Remover

Remove one or more columns from a CSV file. Paste or upload CSV, select columns to delete, download cleaned CSV.

 CSV Column Splitter

Split one CSV into two files by selected columns. Choose which columns go to which output, copy or download both.

 CSV Column Joiner

Combine multiple CSV columns into one with a custom delimiter. Free and private.

 CSV Deduplicator

Remove duplicate rows from CSV. Deduplicate by entire row or by selected columns. Free and private.

 CSV Row Filter

Filter CSV rows by column values or conditions. Keep matching rows, remove unwanted data, download filtered CSV. Free and private.

 CSV Column Analyzer

Distinct counts, top values, and light stats per column. Paste or upload CSV—runs locally.

 CSV Sorter

Sort CSV by column online. Paste or upload CSV, choose column and order, download sorted result. Free and private.

JSON tools

JSON Tools

JSON Viewer

Explore JSON in an expandable tree; format and copy nodes. Runs locally with sensible size limits.

 JSON Validator

Validate JSON and find syntax errors with line and column details. Free and private.

 JSON Schema Generator

Infer draft JSON Schema from sample JSON—types, arrays, and nested objects.

 JSON Diff

Structural compare: paths for added, removed, and changed values. Two pastes or files, in-browser.

 JSON Transformer

Extract by path, pick keys on objects, or filter arrays—then copy or download the result.

 JSON ↔ YAML

Convert JSON to YAML and YAML to JSON in the browser—10 MB limit, bundled js-yaml.

 JSON Formatter & Validator

Format, validate, prettify, and minify JSON in your browser. Free and private.

 JSON to CSV

Convert JSON arrays of objects into CSV format for use in spreadsheet tools like Excel or Google Sheets.

 JSON to TSV

Convert JSON to tab-separated values (TSV) in your browser. Free, fast, and private.

 UUID Generator

Generate UUID v4 values in bulk and validate UUID strings with no upload.

 Unix Timestamp Converter

Epoch ↔ human date with time zones, ISO output, and batch mode for logs.

 CSV to JSON

Convert CSV into a JSON array of objects for use in JavaScript, APIs, or databases.

Text tools

Text Tools

Text Diff Checker

Compare two text blocks side by side with highlighted additions, removals, and changes.

 Remove Duplicate Lines

Remove duplicate lines from text with options like case-sensitivity and preserving order.

 Sort Lines

Sort text lines alphabetically with options like numeric sort and case-sensitivity.

 Word, Line, and Character Counter

Count lines, words, and characters instantly in your browser.

 Find and Replace Text

Find and replace text quickly with options like case-sensitivity and replace all.

 Trim Whitespace

Trim whitespace per line and optionally collapse spaces or remove empty lines.

 URL Slug Generator

Turn titles into clean URL slugs with options for separators, accents, and length.

 Base64 Encoder / Decoder

Encode binary-safe text to Base64 or decode standard Base64 back to text—client-side only.

 Regex Tester

Test regular expressions against sample text with flags and match highlights in the browser.

 Text Case Converter

Switch between upper, lower, title, sentence, and camel case in one paste.

 URL Encoder / Decoder

Encode text for URLs or decode percent-encoded strings back into readable text.

 HTML Encoder / Decoder

Escape or unescape HTML entities for snippets, attributes, and CMS fields.

Converters

Converters

SQL result → CSV / JSON

Paste database result grids into JSON or CSV; optional lightweight SQL pretty-print (no execution).

File tools

File Tools

Batch ZIP Extractor

Unpack multiple ZIP archives in the browser and download individual files or grouped results.

Why choose us

Why Use TinyDataTool

Many data conversion tools require uploading files to external servers. TinyDataTool works differently.

All tools run directly in your browser using client-side processing.

Private

Your files are never uploaded or stored.

Fast

Conversions happen instantly.

Free

All tools are available without signup.

Simple

Each tool focuses on doing one task well.

Use cases

Common Use Cases

TinyDataTool is useful for developers, analysts, and anyone working with structured data.

Typical uses include:

  • preparing CSV files for database imports
  • converting JSON API responses into spreadsheets
  • splitting large CSV exports
  • merging multiple CSV reports
  • converting between comma-separated and tab-separated formats

Because everything runs locally, these tools can also be used safely with sensitive data.

FAQ

Frequently asked questions

Open the tool you need from the list above, paste your data or upload a file, adjust options if needed, then download or copy the result. No signup or account is required.
Yes. Every tool runs in your browser. You can convert, split, merge, sort, filter, and format CSV, TSV, and JSON without installing anything.
Yes. Nothing is uploaded to a server. Processing runs locally in your browser; no data is stored or transmitted.
CSV, TSV, and JSON. Output from the converters works in Excel, Google Sheets, and other spreadsheet or API tools.

More to come

Growing Collection of Data Tools

TinyDataTool is expanding with additional utilities for working with structured data formats including CSV processors, JSON utilities, and data formatting helpers.