How to capture cURL output to a file?

curl -K myconfig.txt -o output.txt 

Writes the first output received in the file you specify (overwrites if an old one exists).

curl -K myconfig.txt >> output.txt

Appends all output you receive to the specified file.

Note: The -K is optional.

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For a single file you can use -O instead of -o filename to use the last segment of the URL path as the filename. Example:

curl http://example.com/folder/big-file.iso -O

will save the results to a new file named big-file.iso in the current folder. In this way it works similar to wget but allows you to specify other curl options that are not available when using wget.

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There are several options to make curl output to a file

 # saves it to myfile.txt
curl http://www.example.com/data.txt -o myfile.txt

# The #1 will get substituted with the url, so the filename contains the url
curl http://www.example.com/data.txt -o "file_#1.txt" 

# saves to data.txt, the filename extracted from the URL
curl http://www.example.com/data.txt -O 

# saves to filename determined by the Content-Disposition header sent by the server.
curl http://www.example.com/data.txt -O -J 

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Either curl or wget can be used in this case. All 3 of these commands do the same thing, downloading the file at http://path/to/file.txt and saving it locally into "my_file.txt":

wget http://path/to/file.txt -O my_file.txt  # my favorite--it has a progress bar
curl http://path/to/file.txt -o my_file.txt
curl http://path/to/file.txt > my_file.txt

Notice the first one's -O is the capital letter "O".

The nice thing about the wget command is it shows a nice progress bar.

You can prove the files downloaded by each of the 3 techniques above are exactly identical by comparing their sha512 hashes. Running sha512sum my_file.txt after running each of the commands above, and comparing the results, reveals all 3 files to have the exact same sha hashes (sha sums), meaning the files are exactly identical, byte-for-byte.

_{See also: wget command to download a file and save as a different filename}

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For those of you want to copy the cURL output in the clipboard instead of outputting to a file, you can use pbcopy by using the pipe | after the cURL command.

Example: curl https://www.google.com/robots.txt | pbcopy. This will copy all the content from the given URL to your clipboard.

Linux version: curl https://www.google.com/robots.txt | xclip

Windows version: curl https://www.google.com/robots.txt | clip

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Use --trace-ascii output.txt to output the curl details to the file output.txt.

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You need to add quotation marks between "URL" -o "file_output" otherwise, curl doesn't recognize the URL or the text file name.

Format

curl "url" -o filename

Example

curl "https://en.wikipedia.org/wiki/Quotation_mark" -o output_file.txt

Example_2

curl "https://en.wikipedia.org/wiki/Quotation_mark" > output_file.txt  

Just make sure to add quotation marks.

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If you want to store your output into your desktop, follow the below command using post command in git bash.It worked for me.

curl https://localhost:8080
    --request POST 
    --header "Content-Type: application/json" 
    -o "C:\Desktop\test.txt"

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A tad bit late, but I think the OP was looking for something like:

curl -K myfile.txt --trace-ascii output.txt

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Writes the first output received in the file you specify (overwrites if an old one exists).

curl -K myconfig.txt >> output.txt

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