Free online tools — fast, private, in your browser
ColaTool brings together practical browser-based tools for everyday creative and technical work — from quick sketches and photo edits to format conversion, encoding helpers and audio trimming.
Open a tool and start working instantly. No downloads or sign-up required.
Files are processed locally in your browser whenever possible. Your work stays on your device.
Paint, photo layers, batch image tools, dev utilities, QR codes and audio editing — curated for daily use.
Custom QR codes with logo, colors, frames and export formats.
/qrcode/Classic MS Paint–style drawing in the browser (JS Paint).
/paint/Layer-based image editor with filters and effects (miniPaint).
/photostudio/Convert, resize, compress and batch process images.
/image/PDF, image, text, JSON, math and more in one app.
/toolbox/Encoding, JSON, hash, regex and developer utilities.
/devtools/Web audio editor with waveforms, effects and export.
/audio/No tools match your search.