---
title: Can I route based on letter casing on Vercel?
description: Information on whether or not it is possible to route based on letting casing with Vercel.
url: "https://vercel.com/kb/guide/can-i-route-based-on-letter-casing-on-vercel"
published: 2025-11-03
last_updated: 2026-10-02
authors: Matthew Sweeney
install_vercel_plugin: npx plugins add vercel/vercel-plugin
---

Vercel provides the ability to route requests based on the three different configuration properties:

- [`redirects`](https://vercel.com/docs/project-configuration#project-configuration/redirects)
  
- [`rewrites`](https://vercel.com/docs/project-configuration#project-configuration/rewrites)
  
- [`routes`](https://vercel.com/docs/project-configuration#legacy/routes)
  

While these properties provide different methods and degrees of flexibility when it comes to routing, it is **not possible** to route based on letter casing with configuration properties.

## Using Serverless Functions

By using [Serverless Functions](https://vercel.com/docs/functions), you can take advantage of code to achieve whatever outcome you require.

For more information on how to do this, take a look at the [Dynamic Routing](https://vercel.com/guides/how-can-i-increase-the-limit-of-redirects-or-use-dynamic-redirects-on-vercel#using-a-serverless-function) support article which contains code examples that allow you full flexibility over routing, the ability to handle errors, and caching headers for maximum performance.

## Related Documentation

- [Vercel Functions](/docs/functions)

## More Vercel Functions guides

- [Optimize Runtime Cache on Vercel](/kb/guide/optimize-runtime-cache-reads-on-vercel): Diagnose rising Runtime Cache usage, trace reads to tags and code paths, and reduce avoidable reads while checking write cost and origin traffic.
- [How to stop Vercel Functions from timing out](/kb/guide/what-can-i-do-about-vercel-serverless-functions-timing-out): Vercel Functions that time out usually trace back to a few causes. Learn how Fluid Compute fixes most of them and how to handle the edge cases.
- [The Complete Guide to Vercel Connect](/kb/guide/vercel-connect): Use Vercel Connect to call provider APIs like Slack, GitHub, Linear, Microsoft, Discord, Snowflake, and Salesforce from your agents and services with short-lived, scoped tokens instead of long-lived secrets.

## Reference Architecture

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- [Agent stack](/kb/architecture/agents): Build and operate agents with models, tools, and durable workflows.
- [Web applications](/kb/architecture/web): Choose rendering, data, authentication, and caching approaches.
- [Backends](/kb/architecture/backends): Choose a runtime, connect services, and run background work.

[Browse all stacks](/kb/architecture)

## Build with prompts

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[Browse the prompt library](/kb/prompts) · [Read the Markdown index](/kb/prompts.md)