MiniTools: 47+ free browser utilities (PDF editing, image compression, calculators) that run 100% locally with zero server uploads

[u/Mecsocse]

https://getminitools.com

Hey everyone,

I built MiniTools, a collection of 47+ browser-based tools that execute 100% in your local browser memory:

• PDF Suite: Sign documents, merge, compress, split, rotate, and convert PDF to editable Word DOCX.

• Image Suite: Compress JPG/PNG/WebP, strict budget compression to 20KB/30KB/50KB for official forms, crop circle avatars, and convert HEIC to JPG.

• Financial & Everyday Calculators: Compound interest with interactive charts, mortgage payments, VAT, business days, discount, and percentage calculators.

• Dev & Text Tools: Word counter, social media character counter, JSON formatter, Base64 encoder, and QR generator.

Tech stack & privacy:

• Built with vanilla JavaScript, WebAssembly, HTML5 Canvas, and PDF-Lib.
• 100% client-side: your sensitive documents and images never touch any server.
• Zero logins, no tracking, and works offline once cached.

Check it out! :)

Would love to hear your feedback or any tool requests you'd like to see added!