Add String Prefix
Add a prefix to the start of a string.
FreeNo uploadNo sign-up
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How to use the Add String Prefix
- Type or paste your input into the Input box, or upload a text file.
- Adjust the options under the tool. The result updates as you type.
- Copy the output or download it as a file.
Private by design
The Add String Prefix runs entirely in your web browser. Nothing you enter or open here is uploaded to a server, so it is safe to use with private data and works even when your connection drops after the page has loaded.
Frequently asked questions
Is the Add String Prefix free?
Yes. The Add String Prefix on Codegres.org is completely free, with no sign-up, no limits and no watermark.
Is my string uploaded anywhere?
No. The Add String Prefix runs entirely in your browser using JavaScript, so your string never leaves your device and is not stored or seen by anyone.
Does the Add String Prefix work on my phone?
Yes. It works in any modern browser on Android, iPhone, Windows, Mac and Linux, with nothing to install.