We've just added support for verifying PDFs on the
blockchain. When you enable
Bitcoin Blockchain Verification,
every generated PDF will have a cryptographic proof embedded in a Bitcoin transaction.
This proof verifies the integrity and existence of a PDF at
the time of the transaction. You could use this feature to verify documents such as
patents, wills, or contracts.
Learn more about the technical details.
To celebrate the launch of this feature, we're giving away
We've created a puzzle with 10 questions, including some programming challenges.
The correct result is the private key for this Bitcoin address:
The questions will be
published on our blog
Friday, 24th November at 12:30 PM PST.
(You can visit the page now to view a countdown timer.)
FormAPI now supports HTML/CSS templates. HTML/CSS templates are great for generating documents
with dynamic content, such as invoices.
You can add advanced logic with
and you can style your template using
HTML/CSS Template documentation
for more information.
We're rolling out support for formulas. You can now perform numeric calculations
and display the results in your PDF. Formulas can be used for things like invoices and tax forms.
Instead of writing code to run the calculations on your server, you can now push that logic
into your PDF templates.
for information about syntax, operators, and functions.
P.S. Special thanks to the awesome
that made this feature possible. You can visit our
to see some of the other open source software that we use.
We've just added support for electronic signatures!
You can now sign documents when you fill out our online forms.
You can also sign documents via our API when you post a Base64 encoded image, or a URL
where the image can be downloaded.
We've added some
documentation for the Signature Field Type.
We hope you will find this feature useful. Please
let us know
if you need any new features, or API client libraries for a particular language.
We made it to the front page of
We received a lot of great comments and feedback, and are excited to make FormAPI even better.
We will be working to improve the performance and user experience (UX) of our template editor.
We'll also be listening closely to our first customers, because we want to be sure that sure we're building
the right features.
One of the most common questions we received is regarding electronic signatures.
We are going to add a new "Signature" type for fields, and will add a signature pad to the online form.
When you generate a PDF via the API, you will need to upload a signature image.
We recommend using the
library on your website.
Thanks for all the great feedback. Please
let us know
if you need any features, or an API client for a specific language.