---
title: Extract a substring from a string value
summary: Isolate a portion of a string identified by a range of characters.
url: https://www.fastly.com/documentation/solutions/examples/extract-a-substring-from-a-string-value
---

Isolate a portion of a string identified by a range of characters.

## VCL

[Try it in Fastly Fiddle](https://fiddle.fastly.dev/1e095859)

## Compute

### Rust

[Try it in Fastly Fiddle](https://fiddle.fastly.dev/ca2f0a3c)

### Javascript

[Try it in Fastly Fiddle](https://fiddle.fastly.dev/99bdd8a2)

### Go

[Try it in Fastly Fiddle](https://fiddle.fastly.dev/e30103e1)