Netstring Encoder & Decoder
Encode and decode UTF-8 netstrings with byte-accurate lengths, batch inspection and text, CSV or JSON exports.
Ready. Explore the example or use the input controls to begin.
Scope and practical limits
JSON arrays preserve empty strings and embedded newlines. Decoding checks length prefixes and commas. Up to 1,000 strings and 50,000 input characters.
The tool processes your work in the browser. The website’s advertising and analytics follow its privacy and consent settings. Projects are not saved automatically. Media workspaces export their files directly rather than storing them in project JSON.
Using Netstring Encoder & Decoder
Netstrings count UTF-8 bytes, not letters; café takes five bytes.
- Start with the included example, or enter your own input.
- Adjust the settings and review the preview and any validation message.
- Download the result or save a project to continue later.
Example
Encode ["café", ""] to 5:café,0:,
Questions & answers
Is a netstring length a character count?
No. The length prefix counts the encoded bytes. This tool uses UTF-8.
Is my project saved automatically?
No. Use Save project to keep an editable copy. Processing runs in the browser; site ads and analytics follow the website privacy and consent settings.
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