Curl Command Builder

Most Linux OSs include curl by default. If not, install it from the terminal:

Install curl on Ubuntu / Debian:

Install curl on CentOS / RHEL / Rocky:

Install curl on Fedora:

Install curl on Arch Linux:

Then verify the installation: curl --version

Curl is included by default on Windows 10 (v1803+) and Windows 11. You can check if it installed in your system by running this command on cmd.exe command prompt: curl --version

The default location of curl.exe is on the system directory:

It is signed with a valid signature from "Microsoft 3rd Party Application Component".

If it is not available in your system, you can download it via winget:

Or you can download it from the official curl website.

By default, curl verifies SSL certificates and will fail if there are issues, e.g:

You can disable SSL certificate verification in curl using the -k option:

Or using the --insecure option:

This tells curl to skip SSL certificate and hostname verification.

HTTP POST request with form data:

Add basic authentication if required:

HTTP POST request with JSON data:

For APIs that return JSON, you can pipe the output to jq for pretty formatting:

The -s option above will suppress the progress meter and error messages.

Include custom headers (e.g Authorization):

Use -v to see the full request and response for debugging.

Curl sends GET requests by default, so you usually don’t need to specify the method.

Basic GET request:

GET with custom request headers:

GET with verbose output (debugging):

You can set a custom user-agent in curl using the -A option:

Or using the --user-agent option:

Show headers only (HEAD request):

Here is an example output with only headers:

Show headers along with the response body:

Verbose output for debugging (headers + extra info):

To set the maximum time curl will wait to establish a TCP connection:

If the server doesn't respond in that time (10 seconds), curl will abort.

To set the maximum total request duration:

This includes time for the connection, sending and receiving data.

You can also use both together for safety:

This ensures you don't hang on slow connections or slow responses.

Upload a file using multipart form data (most common):

Upload with additional form fields:

On Windows OS make sure to wrap the path in quotes if it has spaces:

You can also use forward slashes / in Windows OS:

Upload a file using PUT (raw file upload):

For debugging or progress tracking, add -v or --progress-bar.

Basic FTP upload (with username and password):

Upload to a specific directory on the server:

Use FTP over SSL/TLS (FTPS) for secure upload:

You can also use forward slashes / in Windows OS:

Upload a file using PUT (raw file upload):

For debugging or progress tracking, add -v or --progress-bar.

Download and keep the original filename:

Download and save with a custom filename:

Download with progress bar (default is shown unless -s is used):

Or you can use the --progress-bar option:

Download with resume support (if the download was interrupted):

Use the -L option if the URL might redirect (HTTP 3xx):

This tells curl to automatically follow HTTP 3xx redirects.

You can route curl requests through proxies using the -x or --proxy option.

Use a HTTP proxy:

Use a HTTP proxy with authentication:

Use a SOCKS4 proxy:

Use a SOCKS5 proxy:

Use a SOCKS5 proxy with remote DNS:

Use the -L option to follow HTTP 3xx redirects (like 301 or 302):

Without -L, curl will stop at the redirect and just show the 3xx response.

Verbose output (request & response headers, connection info):

Trace output (detailed debugging, including SSL info):

Trace to stdout (immediate detailed output):