Free Online Tools, Within Reach

A curated collection of tech tools to boost your productivity.

3Tools is a free online toolbox that brings together hand-picked utilities for for Developers, Students, Teacher，Designers, and Professionals.No downloads, no sign-ups — just open and use.

Instant Access

Open in browser, no install

Privacy First

Most tools run locally

100% Free

No account required

Always Updated

New tools every week

Popular Tools

QR Code Generator
Generate common QR codes, QR codes with logo, and GIF QR codes
Barcode Generator
Supported barcodes: CODE128, EAN, CODE39, ITF, MSI, Pharmacode, Codabar
Word Cloud Generator
Generate simple, mask, and colored word clouds from your text and image
Stirling PDF
Stirling PDF is a powerful, open-source PDF editing online platform. Edit, sign, redact, convert, and automate PDFs without sending documents to external
Metronome(节拍器)
Free online metronome with precise Web Audio timing. Supports subdivisions, multiple time signatures, and tap tempo.
Guitar Fretboard Trainer
Free online guitar fretboard trainer. Learn notes and scales on the fretboard with timed drills. Supports beginner and advanced modes.
Loading tools...