Explore · compare · understand
A little curiosity. A useful tool.
Free tools for audio, text, calculations and files. Clear explanations, no account and local processing.
Listen with a question in mind.
Check left and right channels, explore spatial audio, listen to frequencies and compare recordings blind.
Explore headphone tests →What makes a result useful?
Knowing how it was produced — and where its limits are. Zeluvo tools include a method, guidance and context, so you can make sense of what you see or hear.
No account. Your audio files stay on your device.
Make everyday tasks lighter.
Count text, remove duplicate lines, generate passwords, calculate percentages and convert units.
Explore utilities →ZELUVO FILESWork with files locally.
Convert, resize and compress images, transform CSV/JSON, merge PDFs and extract pages.
Explore file tools →