Can I format, validate, and minify outputs with custom indentation?

Yes. Our dual-pane code editor provides live syntax validation, customizable indentation (2 spaces, 4 spaces, tabs), alphabetical key sorting, and instant minification controls.

What is the maximum file or payload size I can convert?

Because processing happens entirely in your local browser memory, you can convert multi-megabyte JSON, YAML, SQL, and CSV payloads with zero network latency or upload timeouts.

Can I use this tool offline without an internet connection?

Yes! Once the webpage is loaded, all client-side conversion logic, parsers, and cryptographic hash functions work completely offline in airplane mode.

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Developer & Data Utilities•Instant Client-Side

CSV & Excel Deduplicator & Splitter

Remove duplicate rows from massive CSV/Excel sheets and split large files into smaller chunks with zero server uploads.

Instant browser processing Private & Auto-Purged

100% In-Browser Data Processing

Your CSV and Excel datasets are parsed, cleaned, deduplicated, and split completely in your browser RAM with zero server transfers.

CSV & Excel Deduplicator & Chunk Splitter

Deduplicate millions of records by custom primary keys or full rows, filter data, and split massive sheets into smaller chunks bundled in a single ZIP.

Drag & drop your file here, or browse

Max file size: 100MB (Free Tier)

Handles up to 500000+ rows directly in browser memory • 100% Secure

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How to Convert with CSV & Excel Deduplicator & Splitter

Follow these 3 simple steps to complete your conversion in seconds.

Step 1 of 3

Paste or Upload Source Data

Paste your CSV & Excel Deduplicator & Splitter code directly into the left editor pane or click Upload to select a file.

💡 Tip: 100% client-side execution in your browser memory. Zero server uploads.

Step 2 of 3

Configure Syntax & Dialect Options

Adjust indentation (2 or 4 spaces), toggle alphabetical key sorting, set SQL table name and dialect quotes, or pick a built-in template.

Step 3 of 3

Instant Result & Copy / Download

View formatted output in real time with line numbers and syntax highlighting. Click Copy or Download to save.

CSV & Excel Deduplicator & Splitter Mathematical Formula & Conversion Logic

Formula representation used for accurate calculations:

Target Value = Source Value × Conversion Coefficient

Calculation Example: 1 Unit = Standard multiplier applied with floating-point precision arithmetic.

CSV & Excel Deduplicator & Splitter Quick Conversion Reference Matrix

Quick reference lookup table for standard unit calculations.

Input Unit	Calculated Output
1 Unit	Standard Ratio
5 Units	5× Ratio
10 Units	10× Ratio
25 Units	25× Ratio
50 Units	50× Ratio
100 Units	100× Ratio

Frequently Asked Questions

Common questions and answers about CSV & Excel Deduplicator & Splitter.

All developer data and security conversions execute 100% client-side directly within your browser’s V8 JavaScript engine. Your strings, code, JWT tokens, and configurations are never transmitted over the network or logged on any server.