PDF Colorizer is described as 'What do you do when your printer is out of black ink and you really need to print a form?' and is an website in the Office & Productivity category. There are more than 10 alternatives to PDF Colorizer, not only websites but also apps for a variety of platforms, including Windows, Mac, iPad, iPhone and Linux. The best alternative is PDF-XChange Editor, which is free. Other great sites and apps similar to PDF Colorizer are Xodo (Freemium), Master PDF Editor (Freemium), PDF Studio (Freemium) and PDF Expert (Paid).
The smallest, fastest, most feature-rich PDF editor/viewer available * Full Direct Content Editing (text based PDFs, not scanned/image based PDFs) * Includes OCR feature * View, Edit, and annotate PDF files
Xodo is the ultimate cross-platform PDF viewer and annotator. Powerful, fast, and optimized for all phones and tablets, Xodo makes it easy to access, edit, mark up, sort, share, sync, manage, sign, and more with even the most complex PDF documents.
PDF Expert lets you read and annotate PDF documents, highlight text, make notes and save these changes being compatible with Preview and Adobe Acrobat. Moreover, PDF Expert is the only iPhone application that can fill PDF forms!
Excellent powerful tool to edit PDF, annotate PDF, redact, protect and more. PRO Version includes: Remove default watermark Combine PDF files Lifetime license - Windows Commercial use Priority Support.