How to save the output of a console.log(object) to a file?

user_1577343 0
Viewed 288861

I tried using JSON.stringify(object), but it doesn't go down on the whole structure and hierarchy.

On the other hand console.log(object) does that but I cannot save it.

In the console.log output I can expand one by one all the children and select and copy/paste but the structure is to big for that.

google-chrome json javascript
10 Answers

Update: You can now just right click

Right click > Save as in the Console panel to save the logged messages to a file.

Original Answer:

You can use this devtools snippet shown below to create a console.save method. It creates a FileBlob from the input, and then automatically downloads it.

(function(console){

console.save = function(data, filename){

    if(!data) {
        console.error('Console.save: No data')
        return;
    }

    if(!filename) filename = 'console.json'

    if(typeof data === "object"){
        data = JSON.stringify(data, undefined, 4)
    }

    var blob = new Blob([data], {type: 'text/json'}),
        e    = document.createEvent('MouseEvents'),
        a    = document.createElement('a')

    a.download = filename
    a.href = window.URL.createObjectURL(blob)
    a.dataset.downloadurl =  ['text/json', a.download, a.href].join(':')
    e.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null)
    a.dispatchEvent(e)
 }
})(console)

Source: http://bgrins.github.io/devtools-snippets/#console-save

user_9605880

This is really late to the party, but maybe it will help someone. My solution seems similar to what the OP described as problematic, but maybe it's a feature that Chrome offers now, but not then. I tried right-clicking and saving the .log file after the object was written to the console, but all that gave me was a text file with this:

console.js:230 Done: Array(50000)[0 … 9999][10000 … 19999][20000 … 29999][30000 … 39999][40000 … 49999]length: 50000__proto__: Array(0)

which was of no use to anyone.

What I ended up doing was finding the console.log(data) in the code, dropped a breakpoint on it and then typed JSON.Stringify(data) in the console which displayed the entire object as a JSON string and the Chrome console actually gives you a button to copy it. Then paste into a text editor and there's your JSON

enter image description here

user_22612450

Right click on object and saving was not available for me.

The working solution for me is given below

Log as pretty string shown in this answer

console.log('jsonListBeauty', JSON.stringify(jsonList, null, 2));

in Chrome DevTools, Log shows as below

saveJsonlog

Just press Copy, It will be copied to clipboard with desired spacing level

Paste it on your favorite text editor and save it

image took on 15/02/2021, Google Chrome Version 88.0.4324.150

user_77653160

A more simple way is to use fire fox dev tools, console.log(yourObject) -> right click on object -> select "copy object" -> paste results into notepad

thanks.

user_51817410
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