How to Use json.dumps Without Newlines for Compact Output?

16 Replies, 2043 Views

Hey folks,

So I was messing around with json.dumps and noticed it adds newlines by default, which is kinda annoying when I want compact output.

Anyone know how to use json dumps without newlines? Like, I just want everything in one line, no extra spaces or breaks.

I tried `indent=None` and `separators=(',', ':')`, but still feels like I'm missing something.

Pls help a noob out!

Thx in advance Smile

P.S. If there's a better way to get json dumps without newlines, lmk!
Hey! You're almost there with `indent=None` and `separators=(',', ':')`. Just make sure you're not accidentally passing any other arguments that might add formatting.

Try this:
```python
import json
data = {"key": "value"}
print(json.dumps(data, indent=None, separators=(',', ':')))
```
This should give you json dumps without newlines. If it doesn't, double-check your code for any extra params.

Also, check out [jsonformatter.curiousconcept.com](https://jsonformatter.curiousconcept.com) for quick JSON formatting tools.
Yo, I had the same issue last week! The trick is to set `indent=None` AND `separators=(',', ':')` together.

Here’s the code snippet:
```python
import json
compact_json = json.dumps({"foo": "bar"}, indent=None, separators=(',', ':'))
print(compact_json)
```
This will give you json dumps without newlines, all in one line. If you’re still seeing newlines, maybe your IDE or terminal is adding them?
Hey! For json dumps without newlines, you’re on the right track. Just a heads-up, some IDEs or text editors might auto-format JSON, so it could look like there are newlines when there aren’t.

Try running this in a plain terminal:
```python
import json
print(json.dumps({"a": 1, "b": 2}, indent=None, separators=(',', ':')))
```
If it still doesn’t work, maybe share your full code snippet so we can debug further.
Hmm, I think you’re missing the `ensure_ascii=False` flag if you’re dealing with non-ASCII characters. That might be messing with your output.

Try this:
```python
import json
data = {"name": "Jöhn"}
print(json.dumps(data, indent=None, separators=(',', ':'), ensure_ascii=False))
```
This should give you json dumps without newlines and handle special characters properly.
If you’re still struggling, you might wanna check out [jsonlint.com](https://jsonlint.com). It’s a great tool for validating and formatting JSON.

For json dumps without newlines, your approach is correct. Just make sure you’re not overriding the `indent` or `separators` elsewhere in your code.
Hey, I feel your pain! JSON formatting can be a headache. For json dumps without newlines, try this:

```python
import json
data = {"key1": "value1", "key2": "value2"}
compact_json = json.dumps(data, indent=None, separators=(',', ':'))
print(compact_json)
```

If it’s still not working, maybe your environment is adding extra formatting. Try running it in a different editor or terminal.
Thanks, everyone! I tried the `indent=None` and `separators=(',', ':')` combo, and it worked like a charm. I was using an IDE that was auto-formatting the output, so that’s why I thought it wasn’t working.

Quick follow-up: Is there a way to prevent IDEs from auto-formatting JSON output? Or do I just have to disable that feature manually?

Also, big shoutout to the tools you guys suggested—super helpful for debugging!
For json dumps without newlines, you’re almost there! Just make sure you’re not using any other formatting tools or libraries that might interfere.

Here’s a quick example:
```python
import json
data = {"example": "data"}
print(json.dumps(data, indent=None, separators=(',', ':')))
```

If you’re still stuck, maybe try [jsoneditoronline.org](https://jsoneditoronline.org) to manually check your JSON output.



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