Solutions
Start from a real-life or work pain point and solve it step by step with the right tool.
Scanned PDF Too Big to Send? How to Shrink It Down
Scanned contracts and photo PDFs often hit tens of MB—too large for email or WeChat. This article explains why scanned PDFs are so big, what compression actually removes, how small you can go without blurring, and when compression won't help.
Video Too Big to Send? How to Compress It to Fit
WeChat won't send it, email attachments exceed limits, uploads stall—video size exceeds platform caps. This article explains why videos are so large, how small you need to go to send, resolution and compression settings by scenario (WeChat/email/Xiaohongshu/TikTok), and how to balance quality vs. size.
Need to Change One Word on an AI-Generated Page—Re-Prompt or Edit Directly?
ChatGPT/Claude HTML landing pages, reports, and slides are often 90% right—one headline, image, or paragraph off. Re-prompting is slow, burns tokens, and can break what already works. This article explains why you should not go back to the prompt, and how to edit HTML without writing code.
Subtitles Out of Sync? First Identify Which Kind
Downloaded subtitles half a beat slow, or fine at the start but drifting later? Out-of-sync subtitles have three distinct causes and three fixes. This article shows how to tell which you have and fix SRT/VTT/ASS in seconds.
Writing WeChat Articles in Markdown—How to Keep Formatting Intact?
WeChat's editor does not understand Markdown; pasting raw source shows # and *, and styled HTML often loses formatting. This article explains why WeChat layouts break, a stable workflow that keeps .md as source, and how to handle images, code blocks, and formulas.
You Write in Markdown—How Do You Deliver Word or PDF?
Markdown feels great to write, but clients, advisors, and colleagues want Word or PDF. This article compares three conversion paths (paste, pandoc CLI, browser conversion), their pitfalls, and how to handle long docs, images, and fonts.
Someone Sent You a .stl/.obj/.glb File—How Do You Open It?
Got STL, OBJ, GLB, FBX, or USDZ with no professional software installed? This article explains what each format stores, why some lack color or animation, and how to view and convert in the browser without installing anything.
How Do I Open an .html File Someone Sent? The Right Way to Preview Online
You receive an .html file—double-click shows code, broken layout, or missing images. This article explains what .html is, why double-click fails, and concrete ways to preview online, check responsive layout, and open files safely.
How Do I Open a Downloaded .md File? Three Ways to Preview and Share
Double-clicking .md shows code or raw # and *—because it is plain-text source that needs rendering. This article explains what .md is, why it won't open as layout, and concrete ways to preview, convert, and share online.
How Do I Open a Downloaded .tex File? First Understand Why It Won't Open
.tex is LaTeX source, not typeset output—double-clicking does nothing by default. This article explains what .tex is, the cost of each way to view layout, and how to choose by need.
How to Export PDF Pages as Sharp Images
Turn PDF pages into images for WeChat, long-image posts, design assets, or PPT inserts. This article covers why convert, text vs. scanned PDF differences, PNG vs. JPG, resolution settings, and what you lose.
How to Export PPT Slides as Sharp Images
Save each PPT slide as an image for WeChat, mobile viewing, video backgrounds, or Word inserts. This article covers why convert, PNG vs. JPG, resolution, font substitution layout drift, and when conversion fails.
Viewers Can't Find the Action in Your Screen Recording—What to Do?
Full-screen recordings hide where you clicked or edited. This article explains why detail gets lost, how dynamic focus (auto zoom) guides attention, plus speed, silence removal, and background polish—with a tool selection table.
Why Does Word-to-PDF Break Layout and Fonts?
After Word to PDF: wrong line breaks, substituted fonts, widened spaces—usually missing font embedding and different render engines. This article explains layout drift, when change is inevitable, and how to preserve fidelity.
How to Insert Math Formulas in Word, PowerPoint, and WeChat Articles—Write Once, Reuse Everywhere
Word's equation editor is slow for complex formulas, PPT screenshots blur when scaled, and WeChat articles don't support equations. This article explains each platform's limits and a stable workflow: write in LaTeX once, export the right format per platform.
LaTeX to PDF Without TeX Live? Know the Limits of Online Conversion First
Installing several GB of TeX just to export one PDF is poor value. This article explains how LaTeX becomes PDF, what online conversion can and cannot do, and how to choose for everyday vs heavy projects.