What 1x is
1x is a small product family by Pham Xuan Hieu built around an everyday problem: the file you have is not in the format you need. It includes the 1xQuickConvertFormat app for Mac, the Save Image as JPG, PNG, WebP Chrome extension, the Bình Dân Học Vụ Số Pro extension for learners on online video courses, and four tools that run on the web. The family also includes Xuan Hieu Learning Note, a note-taking extension for Coursera learners, live on the Chrome Web Store.
Each tool does one concrete job and states its limits. Every page has a "what it does not do" part, because a tool that over-promises lets people down exactly when they need it.
Why nothing is uploaded
Files that need converting are often ID scans, family photos, contracts, payroll sheets, students' work. They should not pass through a stranger's server just to change their extension.
So the 1x web tools read files inside your browser with the browser's own engine. The Mac app converts on the machine and only goes online to activate its licence. The Chrome extension converts images in the browser and sends them nowhere.
Which tool to use
- Files on your Mac, many types, many at once: 1xQuickConvertFormat. Hold Shift, drag, drop on the format.
- An image on a web page: Save Image as JPG, PNG, WebP. Right-click, pick a format.
- A few images on a computer that is not yours: Convert images in your browser.
- Text typed in .VnTime or VNI fonts: Fix TCVN3 and VNI text.
- A CSV with broken accents in Excel: Check a CSV encoding.
- Not sure: Find the right converter.
FAQ
Do the web tools upload my files?
No. Images, text and CSV files are read and processed inside your browser. There is no server receiving files.
Are the web tools free?
Yes. The four tools under Try online are free and need no account.
How do I convert HEIC to JPG?
On a Mac, 1xQuickConvertFormat converts HEIC to JPG, PNG, WebP, AVIF, GIF, TIFF, BMP and ICO on its Free plan. On the web, the image tool can open HEIC only in Safari.
Is the online font fixer the same as the app?
Yes. It uses the same TCVN3 and VNI tables and the same font detection as 1xQuickConvertFormat. The app also handles whole files, without copy and paste.
Who makes 1x?
Pham Xuan Hieu, an AI-native Growth Systems Builder, working on the web since 2012 and publishing at xuanhieu.org since 2014. Contact: mail@xuanhieu.org.