toolthy - Free browser-based tools — PDF, images, audio,

Toolthy is a collection of 30+ free online tools — PDF (merge, split, compress, edit, fill forms), images (compress, resize, convert, HEIC to JPG), audio (convert, extract, trim), calculators (mortgage, loan, salary, age, date), QR/barcode generators, and network diagnostics (speed test, ping, DNS lookup). Everything runs 100% client-side in your browser — your files are never uploaded to a server. No signup required, no watermarks, no artificial limits.