ScriptCore - The private, all-in-one browser toolkit for PDFs, subtitles

Hi Product Hunt! I'm Mehar, a vibe coder and a second-year CS student. Today, I'm launching ScriptCore. This project is personal for me. I built it because I was genuinely tired of how most online tools handle your data. The problem that started it all: Every time I needed to do something simple, like merging a PDF, editing subtitles, or grabbing media, I would find an online tool only to realize it wanted me to upload my files to some random server. There were no clear privacy policies, sketchy ads everywhere, and a paywall hiding the one feature I actually needed. As a developer, this deeply frustrated me. If I felt this way, millions of other people must too. So, I did what any vibe coder would do. I opened VS Code at midnight and started building. What is ScriptCore? ScriptCore is an all-in-one web toolkit that runs completely inside your browser. There is no backend and no server receiving your files. Everything, including every PDF you edit, every subtitle you translate, and every file you process, happens locally on your device. The moment you close the tab, nothing is stored anywhere. Your data is yours, always. This isn't just a feature; it’s the entire philosophy behind ScriptCore. What's inside the toolkit: - Zero uploads, zero risk. Privacy by design, not by promise. Your files never leave your device, period. - Instant processing. No waiting for uploads or downloads. Everything runs at the speed of your own machine. - Complete PDF Suite. Merge, split, compress, and edit your documents without giving them to a third party. - SRT Studio. A powerful subtitle editor and translator made for creators who work with video content every day. - Manga Downloader. Fast, clean, and local media fetching for when you need it. - 100% Free. No paywalls. No premium tiers. No "upgrade to unlock" nonsense. Just pure utility. The tech behind it: ScriptCore is built with React, Vite, and Tailwind CSS. I worked through every component, edge case, and late-night debugging session. It's fast, lightweight, and designed to feel effortless because good tools should get out of your way and just work. What's next: I'm building ScriptCore in public, and I have a growing list of tools I want to add. However, your feedback will shape what comes next more than my own roadmap. I want to build what people actually need, not just what I assume they need. So, here’s my ask: try it out, break it, and let me know what's missing. What tool do you wish existed that respected your privacy? Leave a comment; I read every suggestion. Thank you for being here on launch day. This means a lot to a vibe coder just trying to make the web a little less sketchy, one tool at a time.