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THE49 TOOLS

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Basic features are free. No account needed; inputs stay in your browser.

Universal formats

7 tools available

Data conversion

CSV deduplicator

Remove duplicate rows, keep their first occurrence and export CSV.

Processed locally in your browser
Developer

JSON formatter

Validate, format or minify JSON; copy or download the result.

Processed locally in your browser
Text

Text statistics

Count Unicode characters, Han characters, words and lines.

Processed locally in your browser
Developer

URL encoder / decoder

Encode or decode UTF-8 URL parameters, including Unicode and special characters.

Processed locally in your browser
Data conversion

CSV ↔ JSON

Convert CSV and JSON in your browser, preserving strings and checking table structure.

Processed locally in your browser
Text

Text comparison

Compare two texts by lines or characters, highlight differences and export results.

Processed locally in your browser
Developer

Static QR code

Generate a static QR code from a URL or text, preview it and download PNG or SVG.

Processed locally in your browser