#  filter

Do nothing (the default if `<operation>` is absent)
## Usage
> pdftl `<input>` `[filter]` `output` `<file>` `[<option...>]`

## Details
This does nothing. Use `filter` to keep a PDF file
unchanged, before applying output options (such as
encryption, compression, etc).  This is the default
operation if no operation is explicitly provided.
## Examples

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

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

> Uncompress in.pdf
```
pdftl in.pdf output out.pdf uncompress
```


**Tags**: in_place

*Source: pdftl.operations.filter*

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

*Type: Operation*