#  filter mode

Filter mode: apply output options only

## Details
If no operation is given and one input PDF file is specified,
then filter mode is activated. The input PDF file is processed
minimally and saved with the given output options. This is
likely to be less destructive than using cat.
## Examples

> Do nothing
```
pdftl in.pdf output out.pdf
```

> Do nothing
```
pdftl in.pdf filter output out.pdf
```

> uncompress the input file, making minimal changes
```
pdftl in.pdf output out.pdf uncompress
```

*Source: pdftl.operations.filter*

*Read online: [https://pdftl.readthedocs.io/en/latest/general/filter_mode.html](https://pdftl.readthedocs.io/en/latest/general/filter_mode.html)*

*Type: HelpTopic*