Guides
指南
在瀏覽器中安全處理檔案的實用指南與見解。每篇文章皆直接連結至對應工具。
How to Generate a Strong Password — Stop Memorizing, Start Generating
How to create passwords that resist guessing, and why it works. Generated with cryptographic randomness, never stored or transmitted anywhere.
How to Reduce Video File Size — Even to an Exact 25MB (In Your Browser)
Practical ways to shrink large videos that keep hitting messenger, email, and upload limits — re-encoded inside your browser, with an honest note on big files.
How to Make a Karaoke Track (Remove Vocals from a Song) with AI, in Your Browser
Make a backing track for karaoke practice or covers. An AI source-separation model runs inside your browser — no upload — and you get the isolated vocals too.
How to Open HWP Files Without Hancom Office (Mac, Windows, Phone)
How to read Korean HWP documents without installing Hancom Office — a browser viewer with no upload, plus print and save-to-PDF. Rendering limits stated honestly.
How to Remove a PDF Password — With the Password You Know (In Your Browser)
Turn a PDF that demands a password on every open into a plain PDF. Both the file and the password stay inside your browser — nothing is sent to a server.
How to Convert iPhone HEIC Photos to JPG (When They Won't Open on Windows)
iPhone photos arriving as HEIC and refusing to open? Convert them to JPG or PNG — dozens at once, inside your browser, without uploading them anywhere.
How to Play a Video with SMI or SRT Subtitles (Without Broken Korean Text)
Got a video and a separate SMI/SRT subtitle file? Overlay them in a browser player — it auto-detects the legacy EUC-KR encoding common in Korean SMI files, and lets you nudge sync in 0.5s steps.
How to Make an ID Photo from a Selfie — Sized and Background-Ready
Turn a phone photo into a properly sized ID photo — background removed and replaced with a standard color, cropped to spec, and your face photo never leaves your device.