Curated AI alternatives

Best PDF Studio – Free Online alternatives

Browse 18 free and paid tools similar to PDF Studio – Free Online and find the right option for your workflow.

Top alternatives

Hand-picked tools ranked by relevance and listing quality.

18 tools

ScholarThread

An AI-powered research workspace to read, organize, connect, and understand academic papers.

Remene

Your MRI, in words you understand.

GradeProAI

Effortless Grading for Busy Educators

TokIQ

AI certification practice exams (AWS AIF-C01, Azure AI-901, MLA-C02, GenAI Leader) and daily prompt engineering quizzes.

Topicly

AI microlearning app: pick any topic and get short daily insights and step-by-step learning paths in 5 minutes a day.

Eng-Helper

Eng-Helper is a keyboard that corrects your English as you type, so your messages come out right inside the app you are …

Xingge

Zi Wei Dou Shu charts, read in plain modern English

12 Axes Test

Explore political values across twelve dimensions; AI-assisted analysis in development

moleculardocking.online

One-Click Docking with AutoDock Vina — No Install

YoushowPTE

Preparing for PTE requires more than repeated drills.

LittleStory

AI bedtime stories for kids ages 2–10, personalized with your photo, voice, and words.

WriteSprout

Free printable handwriting worksheets for name tracing, cursive and alphabet practice.

Humanize AI Writer

AI humanizer. Your words, more human.

Startup.Ready.

A free 20-minute assessment that scores your startup across six foundational pillars and routes you to the work that closes the gaps.

Business Chinese AI

Master Business Chinese with AI Role-Play.

Grades Calculator

Easy Grader, Test & Final Grade Calculator

AI Math Solver

Revolutionizing Math Problem-Solving with aimathsolve.com

Metric Converter

Convert anything, anywhere - quick, precise, multilingual.