Konvertio is a free collection of 136+ free online developer tools including encoders, formatters, generators, and converters. All tools run directly in your browser with no data sent to servers.

Is Konvertio free to use?

Yes, all tools on Konvertio are completely free. No signup, no account, no limits.

Absolutely. All tools run entirely in your browser. Your data never leaves your device — nothing is sent to any server.

What tools does Konvertio offer?

Konvertio offers 136+ free online developer tools across 5 categories: Encoders & Decoders (Base64, JWT, URL encoding, hashing), Formatters & Linters (JSON, SQL, CSS, XML, YAML), Generators (passwords, UUIDs, QR codes, Lorem Ipsum), Converters (JSON↔YAML, HTML→JSX, units, colors), and Text Tools (diff checker, word counter, regex tester, markdown preview).

Do I need to create an account?

No. Konvertio requires no signup, login, or account creation. Just visit and start using any tool instantly.

Barcode Generator

Generate Code 128 barcodes from text with customizable options and export to SVG or PNG.

Text to Encode

Bar Width (px)

Height (px)

Show text below barcode

Frequently Asked Questions

Code 128 is a high-density barcode symbology used extensively in logistics, shipping, and product identification. It supports the full ASCII character set (0-127) and uses variable-length encoding with a checksum for accuracy.

This tool uses the Code 128B character set which supports ASCII characters 32-127, including uppercase and lowercase letters, digits, punctuation, and common symbols. Control characters (0-31) are not supported.

The checksum is calculated by summing the start code value plus each data character value multiplied by its position (1-indexed), then taking the result modulo 103. This ensures barcode integrity when scanned.

Yes! You can download as SVG (scalable vector graphics for print) or PNG (raster image for web use). SVG is recommended for printing as it scales to any size without quality loss.