# Environment Variables (Prisma ORM v7) (/docs/orm/v7/reference/environment-variables-reference)

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Reference for Prisma environment variables

Location: ORM > v7 > Reference > Environment Variables

This document describes different environment variables and their use cases.

## Prisma Client [#prisma-client]

### `DEBUG` [#debug]

`DEBUG` is used to enable debugging output in Prisma Client.

Example setting Prisma Client level debugging output:

```bash
# enable only `prisma:client`-level debugging output
export DEBUG="prisma:client"
```

See [Debugging](https://www.prisma.io/docs/orm/v7/prisma-client/debugging-and-troubleshooting/debugging) for more information.

### `NO_COLOR` [#no_color]

`NO_COLOR` if [truthy](https://developer.mozilla.org/en-US/docs/Glossary/Truthy) will activate the `colorless` setting for error formatting and strip colors from error messages.

See [Formatting via environment variables](https://www.prisma.io/docs/orm/v7/prisma-client/setup-and-configuration/error-formatting#formatting-via-environment-variables) for more information.

## Prisma Studio [#prisma-studio]

### `BROWSER` [#browser]

`BROWSER` is for Prisma Studio to force which browser it should be open in, if not set it will open in the default browser.

```bash
BROWSER=firefox prisma studio --port 5555
```

Alternatively you can set this when starting Studio from the CLI as well:

```bash
prisma studio --browser firefox
```

See [Studio](https://www.prisma.io/docs/orm/v7/reference/prisma-cli-reference#studio) documentation for more information.

## Prisma CLI [#prisma-cli]

### `PRISMA_HIDE_PREVIEW_FLAG_WARNINGS` [#prisma_hide_preview_flag_warnings]

`PRISMA_HIDE_PREVIEW_FLAG_WARNINGS` hides the warning message that states that a preview feature flag can be removed. It is a truthy value.

### `PRISMA_HIDE_UPDATE_MESSAGE` [#prisma_hide_update_message]

`PRISMA_HIDE_UPDATE_MESSAGE` is used to hide the update notification message that is shown when a newer Prisma CLI version is available. It's a truthy value.

### `PRISMA_DISABLE_WARNINGS` [#prisma_disable_warnings]

Disables all CLI warnings generated by `logger.warn`.

### `PRISMA_SCHEMA_DISABLE_ADVISORY_LOCK` [#prisma_schema_disable_advisory_lock]

Disables the [advisory locking](https://www.prisma.io/docs/orm/v7/prisma-migrate/workflows/development-and-production#advisory-locking) used by Prisma Migrate. Useful for certain database configurations like Percona-XtraDB-Cluster or MariaDB Galera Cluster.

## Proxy environment variables [#proxy-environment-variables]

The Prisma CLI supports custom HTTP(S) proxies to download the Prisma engines. These can be helpful to use when working behind a corporate firewall. See [Using a HTTP proxy for the CLI](https://www.prisma.io/docs/orm/v7/reference/prisma-cli-reference#using-a-http-proxy-for-the-cli) for more information.

### `NO_PROXY` [#no_proxy]

`NO_PROXY` is a comma-separated list of hostnames or IP addresses that do not require a proxy.

```bash
NO_PROXY=myhostname.com,10.11.12.0/16,172.30.0.0/16
```

### `HTTP_PROXY` [#http_proxy]

`HTTP_PROXY` is set with the hostname or IP address of a proxy server.

```bash
HTTP_PROXY=http://proxy.example.com
```

### `HTTPS_PROXY` [#https_proxy]

`HTTPS_PROXY` is set with the hostname or IP address of a proxy server.

```bash
HTTPS_PROXY=https://proxy.example.com
```

## Related pages

- [`Config API`](https://www.prisma.io/docs/orm/v7/reference/prisma-config-reference): Complete reference for prisma.config.ts configuration options
- [`Connection URLs`](https://www.prisma.io/docs/orm/v7/reference/connection-urls): Learn about the format and syntax Prisma ORM uses for defining database connection URLs for PostgreSQL, MySQL and SQLite
- [`Database Features`](https://www.prisma.io/docs/orm/v7/reference/database-features): Database features supported in Prisma ORM
- [`Error Reference`](https://www.prisma.io/docs/orm/v7/reference/error-reference): Prisma Client, Migrate, and Introspection error codes
- [`Prisma CLI reference`](https://www.prisma.io/docs/orm/v7/reference/prisma-cli-reference): This page gives an overview of all available Prisma CLI commands, explains their options and shows numerous usage examples