# pdftl
[](https://pypi.org/project/pdftl/)
[](https://github.com/pdftl/pdftl/actions/workflows/ci.yml)
[](https://codecov.io/gh/pdftl/pdftl)
[](https://pdftl.readthedocs.io/en/latest/?badge=latest)
[](https://pypi.org/project/pdftl/)
[](#quick-start)
**pdftl** ("PDF tackle") is a CLI tool for PDF manipulation written in Python. It is intended to be a command-line compatible extension of the venerable `pdftk`.
Leveraging the power of [`pikepdf`](https://github.com/pikepdf/pikepdf) ([qpdf](https://github.com/qpdf/qpdf)) and other modern libraries, it offers advanced capabilities like cropping, chopping, regex text replacement, adding text and arbitrary content stream injection.
## Quick start
```bash
pipx install pdftl[full]
# merge, crop to letter paper, rotate last page and output with encryption with one command
pdftl A=a.pdf B=b.pdf cat A1-5 B2-end \
--- crop '4-8,12(letter)' \
--- rotate endright \
output out.pdf owner_pw foo user_pw bar encrypt_aes256
```
## Key features and `pdftk` compatibility
* **Familiar syntax:** Command-line compatible with `pdftk`. Verified against [Mike Haertl's php-pdftk test suite][5] and the [pdftk-java][8] test suite logic, so `s/pdftk/pdftl/` should result in working scripts.
* **Pipelining:** Chain multiple operations in a single command using `---`.
* **Performant:** `pdftl` seems faster than `pdftk-java` for many operations (based on informal benchmarks). Reason: `pdftl` mostly drives `pikepdf` which drives `qpdf`, a fast C++ library.
* **Extra/enhanced operations and features** such as zooming pages, smart merging preserving links and outlines, cropping/chopping up pages, text extraction, optimizing images.
* **Modern security:** Supports AES-256 encryption and modern permission flags out of the box.
* **Content editing:** Find & replace text via regular expressions, inject raw PDF operators, or overlay dynamic text.
`pdftl` maintains command-line compatibility with `pdftk` while introducing features required for modern PDF workflows.
| Feature | `pdftk` (Legacy) | `pdftl` (Modern) |
|:---------------------|:-------------------------|:------------------------------------------------------------------------|
| **Pipelining** | ❌ (Requires temp files) | ✅ **Native** (Chain ops with `---`) |
| **Encryption** | ⚠️ (Obsolete RC4) | ✅ **AES-256 Support** |
| **Syntax** | Standard | ✅ **Compatible Extension** |
| **Page Geometry** | ❌ | ✅ **Crop to fit, Zoom, & Chop** |
| **Pipelined Logic** | ❌ | ✅ **Rotate + Stamp in one command** |
| **Plugins** | ❌ | ✅ **Custom operations/mutation scripts written in Python** |
| **Installation** | Often complex binary | ✅ **Simple `pipx install pdftl`** |
| **Performance** | Variable | ✅ **Powered by pikepdf/qpdf** |
| **Link Integrity** | ⚠️ Often breaks TOC/Links | ✅ **Preserves internal cross-refs** |
| **Shell Completion** | ⚠️ zsh | ✅ **bash, zsh and powershell** |
| **Help** | ⚠️ Basic (manpage) | ✅ **Self-documenting: [`pdftl help `][7]** |
## Installation
Install [`pipx`](https://pipx.pypa.io), and then:
```bash
pipx install pdftl[full]
```
A simple `pip install pdftl[full]` install is also supported.
**Note:** The `[full]` install includes [`ocrmypdf`](https://pypi.org/project/ocrmypdf/) for image optimization, [`reportlab`](https://pypi.org/project/reportlab/) for text generation, [`pypdfium2`](https://pypi.org/project/pypdfium2/) for text extraction and robust flattening, and [`pyHanko`][6] for cryptographic signature functionality. Omit `[full]` to omit those features and dependencies.
## Key features
### 📄 Standard operations
* **Combine:** [`cat`](https://pdftl.readthedocs.io/en/latest/operations/cat.html), [`shuffle`](https://pdftl.readthedocs.io/en/latest/operations/shuffle.html) (interleave pages from multiple docs).
* **Split:** [`burst`](https://pdftl.readthedocs.io/en/latest/operations/burst.html) (split into single pages, by bookmarks, by size,...), [`delete`](https://pdftl.readthedocs.io/en/latest/operations/delete.html) pages or [`delete_blank`](https://pdftl.readthedocs.io/en/latest/operations/delete_blank.html) pages.
* **Metadata:** [`dump_data`](https://pdftl.readthedocs.io/en/latest/operations/dump_data.html), [`update_info`](https://pdftl.readthedocs.io/en/latest/operations/update_info.html), [`set`](https://pdftl.readthedocs.io/en/latest/operations/set.html) page labels, document properties, ...
* **Attachments:** [`attach_files`](https://pdftl.readthedocs.io/en/latest/operations/attach_files.html), [`unpack_files`](https://pdftl.readthedocs.io/en/latest/operations/unpack_files.html), [`dump_files`](https://pdftl.readthedocs.io/en/latest/operations/dump_files.html), [`delete_attachments`](https://pdftl.readthedocs.io/en/latest/operations/delete_attachments.html).
* **Bookmarks:** [`dump_bookmarks`](https://pdftl.readthedocs.io/en/latest/operations/dump_bookmarks.html), [`add_bookmarks`](https://pdftl.readthedocs.io/en/latest/operations/add_bookmarks.html), [`delete_bookmarks`](https://pdftl.readthedocs.io/en/latest/operations/delete_bookmarks.html) and [`update_bookmarks`](https://pdftl.readthedocs.io/en/latest/operations/update_bookmarks.html) with high fidelity, using structured YAML or JSON.
* **Watermarking:** [`stamp`](https://pdftl.readthedocs.io/en/latest/operations/stamp.html) / [`background`](https://pdftl.readthedocs.io/en/latest/operations/background.html) (single page), [`multistamp`](https://pdftl.readthedocs.io/en/latest/operations/multistamp.html) / [`multibackground`](https://pdftl.readthedocs.io/en/latest/operations/multibackground.html).
### ✂️ Geometry & splitting
* **Whole-page geometry:** [`rotate`](https://pdftl.readthedocs.io/en/latest/operations/rotate.html) pages (absolute or relative) or [`zoom`](https://pdftl.readthedocs.io/en/latest/operations/rotate.html) pages
* **Clip** and **Crop:** [`crop`](https://pdftl.readthedocs.io/en/latest/operations/crop.html) pages to margins or standard paper sizes (e.g., "A4"), or keep pages unchanged and [`clip`](https://pdftl.readthedocs.io/en/latest/operations/clip.html) to hide content outside a given region.
* **Chop:** [`chop`](https://pdftl.readthedocs.io/en/latest/operations/chop.html) pages into grids or rows (e.g., split a scanned spread into two pages).
* **Shift, scale and spin** page content *inside* the page boundaries using [`place`](https://pdftl.readthedocs.io/en/latest/operations/place.html).
* **Montage:** [`montage`](https://pdftl.readthedocs.io/en/latest/operations/montage.html) multiple pages onto a grid layout for contact sheets and N-up handouts.
* **Booklet:** create a print-ready [`booklet`](https://pdftl.readthedocs.io/en/latest/operations/booklet.html) with optional RTL support and signature splitting.
### 📝 Forms & annotations
* **Forms:** [`fill_form`](https://pdftl.readthedocs.io/en/latest/operations/fill_form.html), [`generate_fdf`](https://pdftl.readthedocs.io/en/latest/operations/generate_fdf.html), [`dump_data_fields`](https://pdftl.readthedocs.io/en/latest/operations/dump_data_fields.html).
* **Annotations:** [`modify_annots`](https://pdftl.readthedocs.io/en/latest/operations/modify_annots.html) (surgical edits to link properties, colors, borders), [`delete_annots`](https://pdftl.readthedocs.io/en/latest/operations/delete_annots.html), [`dump_annots`](https://pdftl.readthedocs.io/en/latest/operations/dump_annots.html), [`highlight`](https://pdftl.readthedocs.io/en/latest/operations/highlight.html) by full-text regular expression search.
### 🔐 Security
* **Decryption:** using [`input_pw`](https://pdftl.readthedocs.io/en/latest/general/input.html).
* **Encryption:** using [`owner_pw`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#owner-pw-pw), [`user_pw`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#user-pw-pw) and [`encrypt_aes256`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#encrypt-aes256), optionally setting permissions with [`allow`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#allow-perm). Read permissions/encryption data with [`dump_encryption`](https://pdftl.readthedocs.io/en/latest/operations/dump_encryption.html)
* **Signatures:** add secure signatures using [`sign_key`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#sign-key-file) and [`sign_cert`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#sign-cert-file). List and verify signatures using [`dump_signatures`](https://pdftl.readthedocs.io/en/latest/operations/dump_signatures.html) (powered by [`pyHanko`][6]).
### 🛠️ Advanced
* **Text replacement:** [`replace`](https://pdftl.readthedocs.io/en/latest/operations/replace.html) text in content streams using regular expressions (experimental).
* **Code injection:** [`inject`](https://pdftl.readthedocs.io/en/latest/operations/inject.html) raw PDF operators at the head/tail of content streams.
* **Images:** [`optimize_images`](https://pdftl.readthedocs.io/en/latest/operations/optimize_images.html) (smart compression via OCRmyPDF), [`delete_images`](https://pdftl.readthedocs.io/en/latest/operations/delete_images.html), [`dump_images`](https://pdftl.readthedocs.io/en/latest/operations/dump_images.html) or [`render`](https://pdftl.readthedocs.io/en/latest/operations/render.html) PDF to images.
* **Dynamic text:** [`add_text`](https://pdftl.readthedocs.io/en/latest/operations/add_text.html) supports Bates stamping and can add page numbers, filenames, timestamps, etc.
* **Cleanup:** [`normalize`](https://pdftl.readthedocs.io/en/latest/operations/normalize.html) content streams, [`linearize`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#linearize) for web viewing.
* **Layers (aka OCGs):** [`dump_layers`](https://pdftl.readthedocs.io/en/latest/operations/dump_layers.html)) and [`modify_layers`](https://pdftl.readthedocs.io/en/latest/operations/modify_layers.html): list, strip or merge PDF layers.
* **Plugins:** write your own custom operation in Python, save to `~/.config/pdftl/operations` (*nix) or
`%APPDATA%\pdftl\config` (Windows) and you can use it in pdftl, just like the built-in operations. And you can [`mutate_content`](https://pdftl.readthedocs.io/en/latest/operations/mutate_content.html) using simple Python scripts.
## Examples
For more than 100 other examples: `pdftl help examples`.
### Concatenation
```bash
# Merge two files
pdftl in1.pdf in2.pdf cat output combined.pdf
# Now with in2.pdf zoomed in
pdftl A=in1.pdf B=in2.pdf cat A Bz1 output combined2.pdf
```
### Geometry
```bash
# Take pages 1-5, rotate them 90 degrees East, and crop to A4
pdftl in.pdf cat 1-5east --- crop "(a4)" output out.pdf
```
### Pipelining
You can chain operations without intermediate files using `---`:
```bash
# Burst a file, but rotate and stamp every page first
pdftl in.pdf rotate south \
--- stamp watermark.pdf \
--- burst output page_%04d.pdf
```
### Forms and metadata
```bash
# Fill a form and flatten it (make it non-editable)
pdftl form.pdf fill_form data.fdf flatten output signed.pdf
```
### Modify annotations
```bash
# Change all Highlight annotations on odd pages to Red
pdftl docs.pdf modify_annots "odd/Highlight(C=[1 0 0])" output red_notes.pdf
```
### Modify content
```bash
# Add a watermark, the pdftk way
pdftl in.pdf stamp watermark.pdf output marked1.pdf
```
```
# Add an obnoxious semi-transparent red watermark on odd pages only
pdftl in.pdf add_text 'odd/YOUR AD HERE/(position=mid-center, font=Helvetica-Bold, size=72, rotate=45, color=1 0 0 0.5)' output with_ads.pdf
```
```
# Add Bates numbering starting at 000121
# Result: DEF-000121, DEF-000122, ...
pdftl in.pdf \
add_text "/DEF-{page+120:06d}/(position=bottom-center, offset-y=10)" \
output bates.pdf
```
```
# Content stream replacement with regular expressions (YMMV)
# Change black to red
pdftl in.pdf replace '/0 0 0 (RG|rg)/1 0 0 \1/' output redder.pdf
```
## Python API
While `pdftl` is primarily a CLI tool, it also exposes a robust Python API for integrating PDF workflows into your scripts.
It supports both a Functional interface (similar to the CLI) and a Fluent interface (for method chaining).
```python
from pdftl import pipeline
# Chain operations fluently without saving intermediate files
(
pipeline("input.pdf")
.rotate("right")
.stamp("watermark.pdf")
.save("output.pdf")
)
```
See the **[API Tutorial][4]** for more details.
## Operations and options
| Operation | Description |
|---------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------|
| [`add_bookmarks`](https://pdftl.readthedocs.io/en/latest/operations/add_bookmarks.html) | Add top-level bookmarks |
| [`add_text`](https://pdftl.readthedocs.io/en/latest/operations/add_text.html) | Add user-specified text strings to PDF pages |
| [`attach_files`](https://pdftl.readthedocs.io/en/latest/operations/attach_files.html) | Attach files to the output PDF |
| [`background`](https://pdftl.readthedocs.io/en/latest/operations/background.html) | Use a 1-page PDF as the background for each page |
| [`booklet`](https://pdftl.readthedocs.io/en/latest/operations/booklet.html) | Impose pages into printable booklet signatures |
| [`burst`](https://pdftl.readthedocs.io/en/latest/operations/burst.html) | Split a single PDF into multiple files |
| [`cat`](https://pdftl.readthedocs.io/en/latest/operations/cat.html) | Concatenate pages from input PDFs into a new PDF |
| [`chop`](https://pdftl.readthedocs.io/en/latest/operations/chop.html) | Chop pages into multiple smaller pieces |
| [`clip`](https://pdftl.readthedocs.io/en/latest/operations/clip.html) | Clip page content to a rectangle |
| [`crop`](https://pdftl.readthedocs.io/en/latest/operations/crop.html) | Crop pages to a rectangle |
| [`delete`](https://pdftl.readthedocs.io/en/latest/operations/delete.html) | Delete pages from an input PDF |
| [`delete_annots`](https://pdftl.readthedocs.io/en/latest/operations/delete_annots.html) | Delete annotation info |
| [`delete_attachments`](https://pdftl.readthedocs.io/en/latest/operations/delete_attachments.html) | Delete file attachments based on criteria |
| [`delete_bookmarks`](https://pdftl.readthedocs.io/en/latest/operations/delete_bookmarks.html) | Delete bookmarks |
| [`delete_blank`](https://pdftl.readthedocs.io/en/latest/operations/delete_blank.html) | Delete blank or near-blank pages |
| [`delete_images`](https://pdftl.readthedocs.io/en/latest/operations/delete_images.html) | Delete images |
| [`dump_annots`](https://pdftl.readthedocs.io/en/latest/operations/dump_annots.html) | Dump annotation info |
| [`dump_bookmarks`](https://pdftl.readthedocs.io/en/latest/operations/dump_bookmarks.html) | Extract PDF bookmarks into YAML or JSON |
| [`dump_colorspaces`](https://pdftl.readthedocs.io/en/latest/operations/dump_colorspaces.html) | Report color spaces used |
| [`dump_data`](https://pdftl.readthedocs.io/en/latest/operations/dump_data.html) | Metadata, page and bookmark info (XML-escaped) |
| [`dump_data_annots`](https://pdftl.readthedocs.io/en/latest/operations/dump_data_annots.html) | Dump annotation info in pdftk style |
| [`dump_data_fields`](https://pdftl.readthedocs.io/en/latest/operations/dump_data_fields.html) | Print PDF form field data with XML-style escaping |
| [`dump_data_fields_utf8`](https://pdftl.readthedocs.io/en/latest/operations/dump_data_fields_utf8.html) | Print PDF form field data in UTF-8 |
| [`dump_data_utf8`](https://pdftl.readthedocs.io/en/latest/operations/dump_data_utf8.html) | Metadata, page and bookmark info (in UTF-8) |
| [`dump_dests`](https://pdftl.readthedocs.io/en/latest/operations/dump_dests.html) | Print PDF named destinations data to the console |
| [`dump_encryption`](https://pdftl.readthedocs.io/en/latest/operations/dump_encryption.html) | Print PDF encryption details and permissions |
| [`dump_files`](https://pdftl.readthedocs.io/en/latest/operations/dump_files.html) | List file attachments |
| [`dump_images`](https://pdftl.readthedocs.io/en/latest/operations/dump_images.html) | Extract PDF embedded image metadata to JSON |
| [`dump_layers`](https://pdftl.readthedocs.io/en/latest/operations/dump_layers.html) | Dump layer info (JSON) |
| [`dump_signatures`](https://pdftl.readthedocs.io/en/latest/operations/dump_signatures.html) | List and validate digital signatures |
| [`dump_text`](https://pdftl.readthedocs.io/en/latest/operations/dump_text.html) | Print PDF text data to the console or a file |
| [`fill_form`](https://pdftl.readthedocs.io/en/latest/operations/fill_form.html) | Fill a PDF form |
| [`filter`](https://pdftl.readthedocs.io/en/latest/operations/filter.html) | Do nothing (the default if `` is absent) |
| [`generate_fdf`](https://pdftl.readthedocs.io/en/latest/operations/generate_fdf.html) | Generate an FDF file containing PDF form data |
| [`highlight`](https://pdftl.readthedocs.io/en/latest/operations/highlight.html) | Highlight text matching a regex pattern |
| [`inject`](https://pdftl.readthedocs.io/en/latest/operations/inject.html) | Inject code at start or end of page content streams |
| [`insert`](https://pdftl.readthedocs.io/en/latest/operations/insert.html) | Insert blank pages |
| [`modify_annots`](https://pdftl.readthedocs.io/en/latest/operations/modify_annots.html) | Modify properties of existing annotations |
| [`modify_layers`](https://pdftl.readthedocs.io/en/latest/operations/modify_layers.html) | Merge or strip specific layers |
| [`montage`](https://pdftl.readthedocs.io/en/latest/operations/montage.html) | Impose pages onto a grid layout |
| [`move`](https://pdftl.readthedocs.io/en/latest/operations/move.html) | Move pages to a new location |
| [`multibackground`](https://pdftl.readthedocs.io/en/latest/operations/multibackground.html) | Use multiple pages as backgrounds |
| [`multistamp`](https://pdftl.readthedocs.io/en/latest/operations/multistamp.html) | Stamp multiple pages onto an input PDF |
| [`mutate_content`](https://pdftl.readthedocs.io/en/latest/operations/mutate_content.html) | Mutate page content streams using a user-supplied Python script |
| [`normalize`](https://pdftl.readthedocs.io/en/latest/operations/normalize.html) | Reformat page content streams |
| [`optimize_images`](https://pdftl.readthedocs.io/en/latest/operations/optimize_images.html) | Optimize images |
| [`place`](https://pdftl.readthedocs.io/en/latest/operations/place.html) | Shift, scale, and spin page content |
| [`replace`](https://pdftl.readthedocs.io/en/latest/operations/replace.html) | Regex replacement on page content streams |
| [`render`](https://pdftl.readthedocs.io/en/latest/operations/render.html) | Render PDF pages as images |
| [`rotate`](https://pdftl.readthedocs.io/en/latest/operations/rotate.html) | Rotate pages in a PDF |
| [`set`](https://pdftl.readthedocs.io/en/latest/operations/set.html) | Set document properties, viewer preferences, and page labels |
| [`shuffle`](https://pdftl.readthedocs.io/en/latest/operations/shuffle.html) | Interleave pages from multiple input PDFs |
| [`stamp`](https://pdftl.readthedocs.io/en/latest/operations/stamp.html) | Stamp a 1-page PDF onto each page of an input PDF |
| [`unpack_files`](https://pdftl.readthedocs.io/en/latest/operations/unpack_files.html) | Unpack file attachments |
| [`unpause`](https://pdftl.readthedocs.io/en/latest/operations/unpause.html) | Remove 'pause' frames from a slide deck |
| [`update_bookmarks`](https://pdftl.readthedocs.io/en/latest/operations/update_bookmarks.html) | Replace PDF bookmarks from a YAML or JSON file |
| [`update_info`](https://pdftl.readthedocs.io/en/latest/operations/update_info.html) | Update PDF metadata from dump_data instructions |
| [`update_info_utf8`](https://pdftl.readthedocs.io/en/latest/operations/update_info_utf8.html) | Update PDF metadata from dump_data_utf8 instructions |
| [`zoom`](https://pdftl.readthedocs.io/en/latest/operations/zoom.html) | Rescale entire pages |
| Option | Description |
|--------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------|
| [`allow `](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#allow-perm) | Specify permissions for encrypted files |
| [`compress`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#compress) | Compress output file streams (default) |
| [`drop_info`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#drop-info) | Discard document-level info metadata |
| [`drop_xfa`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#drop-xfa) | Discard form XFA data if present |
| [`drop_xmp`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#drop-xmp) | Discard document-level XMP metadata |
| [`encrypt_128bit`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#encrypt-128bit) | Use 128 bit encryption (obsolete, maybe insecure) |
| [`encrypt_40bit`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#encrypt-40bit) | Use 40 bit encryption (obsolete, highly insecure) |
| [`encrypt_aes128`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#encrypt-aes128) | Use 128 bit AES encryption (maybe obsolete) |
| [`encrypt_aes256`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#encrypt-aes256) | Use 256 bit AES encryption |
| [`fast`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#fast) | Skip stream recompression for faster saving |
| [`flatten`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#flatten) | Flatten all annotations |
| [`keep_final_id`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#keep-final-id) | Copy final input PDF's ID metadata to output |
| [`keep_first_id`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#keep-first-id) | Copy first input PDF's ID metadata to output |
| [`linearize`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#linearize) | Linearize output file(s) |
| [`no_encrypt_metadata`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#no-encrypt-metadata) | Leave metadata unencrypted |
| [`need_appearances`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#need-appearances) | Set a form rendering flag in the output PDF |
| [`output `](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#output-file) | The output file path, or a template for burst |
| [`owner_pw `](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#owner-pw-pw) | Set owner password and encrypt output |
| [`replacement_font `](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#replacement-font-file) | Replace the font used for all form fields with a TTF file |
| [`sign_cert `](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#sign-cert-file) | Path to certificate PEM |
| [`sign_field `](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#sign-field-name) | Signature field name (default: Signature1) |
| [`sign_key `](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#sign-key-file) | Path to private key PEM |
| [`sign_pass_env `](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#sign-pass-env-var) | Environment variable with sign_cert passphrase |
| [`sign_pass_prompt`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#sign-pass-prompt) | Prompt for sign_cert passphrase |
| [`uncompress`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#uncompress) | Disable compression of output file streams |
| [`user_pw `](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#user-pw-pw) | Set user password and encrypt output |
| [`verbose`](https://pdftl.readthedocs.io/en/latest/misc/output_options.html#verbose) | Turn on verbose output |
## Links
* **License:** This project is licensed under the [Mozilla Public License 2.0][1].
* **Changelog:** [CHANGELOG.md][2].
* **Documentation:** [pdftl.readthedocs.io][3].
[1]: https://raw.githubusercontent.com/pdftl/pdftl/main/LICENSE
[2]: https://github.com/pdftl/pdftl/blob/main/CHANGELOG.md
[3]: https://pdftl.readthedocs.io
[4]: https://pdftl.readthedocs.io/en/latest/api_tutorial.html
[5]: https://github.com/mikehaertl/php-pdftk
[6]: https://github.com/MatthiasValvekens/pyHanko
[7]: https://pdftl.readthedocs.io/en/latest/general/help.html
[8]: https://gitlab.com/pdftk-java/pdftk