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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Experience effortless PDF management with the best alternative to MuPDF & Formstack
Create and edit PDFs
Instantly customize your PDFs any way you want, or start fresh with a new document.
Fill out PDF forms
Stop spending hours doing forms by hand. Complete your tax reporting and other paperwork fast and error-free.
Build fillable documents
Add fillable fields to your PDFs and share your forms with ease to collect accurate data.
Save reusable templates
Reclaim working hours by generating new documents with reusable pre-made templates.
Get eSignatures done
Forget about printing and mailing documents for signature. Sign your PDFs or request signatures in a few clicks.
Convert files
Say goodbye to unreliable third-party file converters. Save your files in various formats right in pdfFiller.
Organize your PDFs
Merge, split, and rearrange the pages of your PDFs in any order.
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 withan 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
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
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.