data/develop/api-reference/configuration/config-toml.md

---
title: config.toml
slug: /develop/api-reference/configuration/config.toml
---

## config.toml

`config.toml` is an optional file you can define for your working directory or global development environment. When `config.toml` is defined both globally and in your working directory, Streamlit combines the configuration options and gives precendence to the working-directory configuration. Additionally, you can use environment variables and command-line options to override additional configuration options. For more information, see [Configuration options](/develop/concepts/configuration/options).

### File location

To define your configuration locally or per-project, add `.streamlit/config.toml` to your working directory. Your working directory is wherever you call `streamlit run`. If you haven't previously created the `.streamlit` directory, you will need to add it.

To define your configuration globally, you must first locate your global `.streamlit` directory. Streamlit adds this hidden directory to your OS user profile during installation. For MacOS/Linx, this will be `~/.streamlit/config.toml`. For Windows, this will be `%userprofile%/.streamlit/config.toml`.

### File format

`config.toml` is a [TOML](https://toml.io/en/) file.

#### Example

```toml
[client]
showErrorDetails = false

[theme]
primaryColor = "#F63366"
backgroundColor = "black"
```

### Available configuration options

Below are all the sections and options you can have in your `.streamlit/config.toml` file. To see all configurations, use the following command in your terminal or CLI:

```bash
streamlit config show
```

#### Global

```toml
[global]

# ***DEPRECATED***
# global.disableWatchdogWarning has been deprecated has been deprecated and
# will be removed in a future version. This option will be removed on or after
# 2024-01-20.
# ****************
# By default, Streamlit checks if the Python watchdog module is available
# and, if not, prints a warning asking for you to install it. The watchdog
# module is not required, but highly recommended. It improves Streamlit's
# ability to detect changes to files in your filesystem.
# If you'd like to turn off this warning, set this to True.
# Default: false
disableWatchdogWarning = false

# By default, Streamlit displays a warning when a user sets both a widget
# default value in the function defining the widget and a widget value via
# the widget's key in `st.session_state`.
# If you'd like to turn off this warning, set this to True.
# Default: false
disableWidgetStateDuplicationWarning = false

# If True, will show a warning when you run a Streamlit-enabled script
# via "python my_script.py".
# Default: true
showWarningOnDirectExecution = true
```

#### Logger

```toml
[logger]

# Level of logging: 'error', 'warning', 'info', or 'debug'.
# Default: 'info'
level = "info"

# String format for logging messages. If logger.datetimeFormat is set,
# logger messages will default to `%(asctime)s.%(msecs)03d %(message)s`. See
# Python's documentation for available attributes:
# https://docs.python.org/2.6/develop/logging.html#formatter-objects
# Default: "%(asctime)s %(message)s"
messageFormat = "%(asctime)s %(message)s"
```

#### Client

```toml
[client]

# ***DEPRECATED***
# client.caching has been deprecated and is not required anymore for our new
# caching commands. This option will be removed on or after 2024-01-20.
# ****************
# Whether to enable st.cache. This does not affect st.cache_data or
# st.cache_resource.
# Default: true
caching = true

# ***DEPRECATED***
# client.displayEnabled has been deprecated and will be removed in a future
# version. This option will be removed on or after 2024-01-20.
# ****************
# If false, makes your Streamlit script not draw to a Streamlit app.
# Default: true
displayEnabled = true

# Controls whether uncaught app exceptions and deprecation warnings
# are displayed in the browser. By default, this is set to True and
# Streamlit displays app exceptions and associated tracebacks, and
# deprecation warnings, in the browser.
#
# If set to False, deprecation warnings and full exception messages
# will print to the console only. Exceptions will still display in the
# browser with a generic error message. For now, the exception type and
# traceback show in the browser also, but they will be removed in the
# future.
# Default: true
showErrorDetails = true

# Change the visibility of items in the toolbar, options menu,
# and settings dialog (top right of the app).
# Allowed values:
# * "auto"      : Show the developer options if the app is accessed through
#                 localhost or through Streamlit Community Cloud as a developer.
#                 Hide them otherwise.
# * "developer" : Show the developer options.
# * "viewer"    : Hide the developer options.
# * "minimal"   : Show only options set externally (e.g. through
#                 Streamlit Community Cloud) or through st.set_page_config.
#                 If there are no options left, hide the menu.
# Default: "auto"
toolbarMode = "auto"

# Controls whether the default sidebar page navigation in a multipage app is
# displayed.
# Default: true
showSidebarNavigation = true
```

#### Runner

```toml
[runner]

# Allows you to type a variable or string by itself in a single line of
# Python code to write it to the app.
# Default: true
magicEnabled = true

# ***DEPRECATED***
# runner.installTracer has been deprecated and will be removed in a future
# version. This option will be removed on or after 2024-01-20.
# ****************
# Install a Python tracer to allow you to stop or pause your script at
# any point and introspect it. As a side-effect, this slows down your
# script's execution.
# Default: false
installTracer = false

# ***DEPRECATED***
# runner.fixMatplotlib has been deprecated and will be removed in a future
# version. This option will be removed on or after 2024-01-20.
# ****************
# Sets the MPLBACKEND environment variable to Agg inside Streamlit to
# prevent Python crashing.
# Default: true
fixMatplotlib = true

# Handle script rerun requests immediately, rather than waiting for script
# execution to reach a yield point. This makes Streamlit much more
# responsive to user interaction, but it can lead to race conditions in
# apps that mutate session_state data outside of explicit session_state
# assignment statements.
# Default: true
fastReruns = true

# Raise an exception after adding unserializable data to Session State.
# Some execution environments may require serializing all data in Session
# State, so it may be useful to detect incompatibility during development,
# or when the execution environment will stop supporting it in the future.
# Default: false
enforceSerializableSessionState = false

# Adjust how certain 'options' widgets like radio, selectbox, and
# multiselect coerce Enum members when the Enum class gets
# re-defined during a script re-run. For more information, check out the docs:
# https://docs.streamlit.io/develop/concepts/design/custom-classes#enums
#
# Allowed values:
# * "off"          : Disables Enum coercion.
# * "nameOnly"     : Enum classes can be coerced if their member names match.
# * "nameAndValue" : Enum classes can be coerced if their member names AND
#                    member values match.
# Default: "nameOnly"
enumCoercion = "nameOnly"
```

#### Server

```toml
[server]

# List of folders that should not be watched for changes. This
# impacts both "Run on Save" and @st.cache.
# Relative paths will be taken as relative to the current working directory.
# Example: ['/home/user1/env', 'relative/path/to/folder']
# Default: []
folderWatchBlacklist = []

# Change the type of file watcher used by Streamlit, or turn it off
# completely.
# Allowed values:
# * "auto"     : Streamlit will attempt to use the watchdog module, and
#                falls back to polling if watchdog is not available.
# * "watchdog" : Force Streamlit to use the watchdog module.
# * "poll"     : Force Streamlit to always use polling.
# * "none"     : Streamlit will not watch files.
# Default: "auto"
fileWatcherType = "auto"

# Symmetric key used to produce signed cookies. If deploying on multiple
# replicas, this should be set to the same value across all replicas to ensure
# they all share the same secret.
# Default: randomly generated secret key.
cookieSecret = "a-random-key-appears-here"

# If false, will attempt to open a browser window on start.
# Default: false unless (1) we are on a Linux box where DISPLAY is unset, or
# (2) we are running in the Streamlit Atom plugin.
headless = false

# Automatically rerun script when the file is modified on disk.
# Default: false
runOnSave = false

# The address where the server will listen for client and browser
# connections. Use this if you want to bind the server to a specific address.
# If set, the server will only be accessible from this address, and not from
# any aliases (like localhost).
# Default: (unset)
address =

# The port where the server will listen for browser connections.
# Don't use port 3000 which is reserved for internal development.
# Default: 8501
port = 8501

# The base path for the URL where Streamlit should be served from.
# Default: ""
baseUrlPath = ""

# Enables support for Cross-Origin Resource Sharing (CORS) protection, for
# added security.
# Due to conflicts between CORS and XSRF, if `server.enableXsrfProtection` is
# on and `server.enableCORS` is off at the same time, we will prioritize
# `server.enableXsrfProtection`.
# Default: true
enableCORS = true

# Enables support for Cross-Site Request Forgery (XSRF) protection, for added
# security.
# Due to conflicts between CORS and XSRF, if `server.enableXsrfProtection` is
# on and `server.enableCORS` is off at the same time, we will prioritize
# `server.enableXsrfProtection`.
# Default: true
enableXsrfProtection = true

# Max size, in megabytes, for files uploaded with the file_uploader.
# Default: 200
maxUploadSize = 200

# Max size, in megabytes, of messages that can be sent via the WebSocket
# connection.
# Default: 200
maxMessageSize = 200

# Enables support for websocket compression.
# Default: false
enableWebsocketCompression = false

# Enable serving files from a `static` directory in the running app's
# directory.
# Default: false
enableStaticServing = false

# Server certificate file for connecting via HTTPS.
# Must be set at the same time as "server.sslKeyFile".
# ['DO NOT USE THIS OPTION IN A PRODUCTION ENVIRONMENT. It has not gone through
# security audits or performance tests. For the production environment, we
# recommend performing SSL termination by the load balancer or the reverse
# proxy.']
# sslCertFile =

# Cryptographic key file for connecting via HTTPS.
# Must be set at the same time as "server.sslCertFile".
# ['DO NOT USE THIS OPTION IN A PRODUCTION ENVIRONMENT. It has not gone through
# security audits or performance tests. For the production environment, we
# recommend performing SSL termination by the load balancer or the reverse
# proxy.']
# sslKeyFile =
```

#### Browser

```toml
[browser]

# Internet address where users should point their browsers in order to
# connect to the app. Can be IP address or DNS name and path.
# This is used to:
# - Set the correct URL for CORS and XSRF protection purposes.
# - Show the URL on the terminal
# - Open the browser
# Default: "localhost"
serverAddress = "localhost"

# Whether to send usage statistics to Streamlit.
# Default: true
gatherUsageStats = true

# Port where users should point their browsers in order to connect to the
# app.
# This is used to:
# - Set the correct URL for XSRF protection purposes.
# - Show the URL on the terminal (part of `streamlit run`).
# - Open the browser automatically (part of `streamlit run`).
# This option is for advanced use cases. To change the port of your app, use
# `server.Port` instead. Don't use port 3000 which is reserved for internal
# development.
# Default: whatever value is set in server.port.
serverPort = 8501
```

#### Mapbox

```toml
[mapbox]

# Configure Streamlit to use a custom Mapbox
# token for elements like st.pydeck_chart and st.map.
# To get a token for yourself, create an account at
# https://mapbox.com. It's free (for moderate usage levels)!
# Default: ""
token = ""
```

#### Deprecation

```toml
[deprecation]

# Set to false to disable the deprecation warning for using the global pyplot
# instance.
# Default: true
showPyplotGlobalUse = true
```

#### Theme

```toml
[theme]

# The preset Streamlit theme that your custom theme inherits from.
# One of "light" or "dark".
# base =

# Primary accent color for interactive elements.
# primaryColor =

# Background color for the main content area.
# backgroundColor =

# Background color used for the sidebar and most interactive widgets.
# secondaryBackgroundColor =

# Color used for almost all text.
# textColor =

# Font family for all text in the app, except code blocks. One of "sans serif",
# "serif", or "monospace".
# font =
```