About LocalTools
LocalTools is a collection of free tools that run entirely inside your browser — convert and compress images, edit and sign PDFs, generate invoices and QR codes, run financial calculators, and more. It started with a single image-to-PDF converter, built out of frustration with tools that upload your files to a server, stamp watermarks on the result, or hide the download behind a sign-up.
Every tool here follows one rule: your data never leaves your device. Modern browsers can decode HEIC photos, rebuild PDFs, run AI background removal and render MRI scans locally — so that’s where all of it happens. There is no upload step to wait for, no server to trust, and the tools keep working offline once a page has loaded.
What that means in practice
- Private by design — files, text and numbers are processed on your device; we never have a copy.
- No sign-up, no watermark, no cost — every tool, in full, free.
- No artificial limits — no page caps or daily quotas; the only ceiling is your device’s memory.
- Works everywhere — any modern browser on Windows, macOS, Linux, Android or iPhone.
Who runs this
LocalTools is built and maintained by Vladyslav Kornieiev, an independent software developer. Tools get added and improved based on what people ask for — if something’s missing or broken, say so.
The guiding rule is simple: if a tool can’t run entirely in the browser without sending your data anywhere, it doesn’t belong here. That constraint has led to some interesting technical choices — on-device AI models, Wasm-based DICOM loading, streaming PDF assembly, and careful object-URL hygiene so nothing leaks.
The same standard applies to the words on every page. Each tool gets its own real explanation — formulas, trade-offs, limitations, “why this format is bigger than that one” — not templated filler. The guides go deeper on the underlying topics (image compression internals, PDF structure, what a digital signature actually proves, how amortization really works) so the tools become more useful instead of just more numerous.
Explore the tools
Contact
Questions, feedback or a bug report? Email contact@localtools.io or use the contact page.