Lumi Studio free tools
Small browser tools that solve real problems.
Premium, fast, single-purpose utilities for money, health estimates, study, screen time, storage, voice notes, zodiac, resumes, passport photos, image sharpness, and PDF creation. No accounts. Your data never leaves your browser where relevant.
Privacy-first funnels for useful iOS apps
Each tool gives instant value on the web, then points to the matching Lumi Studio iPhone app when you need the full workflow.
Free interactive tools
ATS Resume Checker
Score your resume for ATS basics, keywords, quantified wins, and practical fixes.
🪪Passport Photo Size Guide
Find passport and ID photo dimensions and rules for 40+ countries.
⏱️Price to Work Hours Calculator
Convert any price into hours of your life based on wage or salary.
🔍Image Blur Checker
Upload a photo and estimate sharpness locally with canvas analysis.
🧾Image to PDF Converter
Combine JPG/PNG images into a downloadable PDF entirely in-browser.
💱Live Currency Converter
Convert travel money with live rates and a real cost tip.
🌙Period Cycle Calculator
Estimate next period, fertile window, ovulation day, and current phase.
🎧TOEIC Score Estimator
Estimate TOEIC Listening and Reading scaled scores from raw correct answers.
📱Screen Time Cost Calculator
See phone use as yearly hours, full days, and books you could read.
🖼️iPhone Storage Calculator
Estimate GB used by photos, 4K videos, and apps with tweakable defaults.
🎙️Voice to Text
Use browser speech recognition for live transcription and copyable notes.
🐉Chinese Zodiac Calculator
Find your zodiac animal, element, and birth-year personality snapshot.
Why Lumi Tools?
They are free, fast, mobile-responsive, and client-side. Files, resumes, salaries, cycle dates, transcripts, and photos stay on your device whenever the tool can run locally — a better default for personal productivity.