pdfFiller is the MuPDF and Formstack alternative that respects your time and budget

Over 64 million users choose pdfFiller for its award-winning ease of use, comprehensive functionality, and unbeatable price.
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4.6/5
— from 710 reviews
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Experience effortless PDF management with the best alternative to MuPDF & Formstack

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Create and edit PDFs

Instantly customize your PDFs any way you want, or start fresh with a new document.
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Fill out PDF forms

Stop spending hours doing forms by hand. Complete your tax reporting and other paperwork fast and error-free.
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Build fillable documents

Add fillable fields to your PDFs and share your forms with ease to collect accurate data.
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Save reusable templates

Reclaim working hours by generating new documents with reusable pre-made templates.
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Get eSignatures done

Forget about printing and mailing documents for signature. Sign your PDFs or request signatures in a few clicks.
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Convert files

Say goodbye to unreliable third-party file converters. Save your files in various formats right in pdfFiller.
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Organize your PDFs

Merge, split, and rearrange the pages of your PDFs in any order.
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Securely store documents

Keep all your documents in one place without exposing your sensitive data.

Customer trust proven by figures

pdfFiller is proud of its massive user base and is committed to delivering the greatest possible experience and value to each customer.

Switch from MuPDF & Formstack to pdfFiller in 4 simple steps

1
Sign up for free using your email, Google, or Facebook account.
2
Upload a PDF from your device or cloud storage, check the online library for the form you need, or create a document from scratch.
3
Edit, annotate, redact, or eSign your PDF online in seconds.
4
Share your document, download it in your preferred format, or save it as a template.

Get started with
an all‑in‑one PDF software

Save up to 40 hours per month with paper-free processes
Make quick changes to your PDFs even while on the go
Streamline approvals, teamwork, and document sharing
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The leading MuPDF & Formstack alternative for SMBs and enterprises

Break free from paperwork setbacks with digital workflows.
Advanced eSignatures
Enterprise-ready features
Integrations and API
Organizations & Admin Dashboard

Find out why users choose pdfFiller over MuPDF and Formstack

Read more or give pdfFiller a try to experience the benefits for yourself
9.1
Ease of Use
9.0
Quality of Support
9.2
Ease of Setup
5
So far I have found PDF Filller to be extremely useful and I use it often.
Anonymous Customer
4
easy to use and reasonably priced. The only difficulty I had was finding how to get back to the template once I'd done one 1099. There is probably a way to keep my company info for each subsequent form but I didn't find it. I only had a few 1099's so this worked great and will want to use it next year.
Anonymous Customer

Do more with pdfFiller, the better MuPDF alternative

pdfFiller is a cloud-based editor that provides multi-level document management. When compared with MuPDF or Formstack, you get all of their features for creating professional-looking templates, in one platform. Edit PDFs’ original content, store forms in the cloud, and e-sign docs in seconds. With this web-based solution you get a chance to work with documents across all your devices, from anywhere. Log into your account and start creating professional forms, contracts and other documents.
Get everything you need to create professional-looking PDF files efficiently:
Ability to edit original content
Built-in online signature solution
User-friendly mobile app
Numerous PDF editing tools
Vast Forms library
Top-notch security
pdfFiller is a cloud editor with a trusted user history making it a great alternative to MuPDF. It outperforms competitors and is available on desktop or mobile, all around the world.
Interested in purchasing pdfFiller for your entire organization? Share your details, and our sales reps will help you get started. For small teams, explore our pricing page to choose the most suitable plan.
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