Convert Anything
Address, exchange rates, images, text, units — all conversions in one place. Processed entirely in your browser. No data sent to servers.
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Useful tools for content and video work
Find the right tool for your task
Convert JPG/PNG to WebP to reduce file size. Processed entirely in your browser — your files never leave your device.
Go to Image Converter →Pull subtitles from any public YouTube video as plain text. Supports auto-generated and manual captions in all languages.
Go to YouTube Media →Convert between 31 currencies using real-time Bank of Korea rates, with historical trend charts.
Go to Exchange Rate →Convert API responses or JSON files to CSV or XLSX for easy sharing with your team.
Go to Developer Tools →Compress CSS and JavaScript to speed up page loads, or beautify minified code for readability.
Go to Developer Tools →Find road addresses, lot numbers, English addresses and postal codes from the Korean Ministry of the Interior database.
Go to Address Lookup →Coming Soon
What is y→x?
y→x is a free online tool suite for everyday conversion needs — addresses, exchange rates, image formats, text extraction, unit conversion, and more. Most features run entirely in your browser, keeping your data private and processing fast. No sign-up required.
Why Choose y→x
Privacy First
Most features process data locally in your browser — no file uploads to servers.
Fast Processing
No server round-trips means near-instant results.
Completely Free
All tools are free to use. Ads support the service on some features.
4 Languages
Available in Korean, English, Japanese, and Chinese.
Frequently Asked Questions
- Q. Is y→x free to use?
- A. Yes, all tools are provided free of charge. Ads may appear on some features to help maintain the service.
- Q. Do I need to sign up or log in?
- A. No, you can use all features instantly without signing up or logging in.
- Q. Is my data stored on servers?
- A. Most features such as image conversion and unit conversion are processed directly in your browser and are never sent to a server. For features like text extraction, data is deleted immediately after processing.
- Q. Can I use it on mobile?
- A. Yes, all tools are optimized for mobile browsers. You can use them conveniently on smartphones and tablets.
- Q. Which browsers are supported?
- A. Available on all modern browsers including Chrome, Safari, Firefox, and Edge.
- Q. How do I convert JPG or PNG to WebP?
- A. Open the Image Converter tool, upload your file, and select WebP as the output format. All processing happens in your browser — no file is sent to any server.
- Q. Can I extract YouTube subtitles as text?
- A. Yes. Paste any public YouTube video URL into the YouTube Media tool to extract captions as plain text. Both auto-generated and manual subtitles are supported, and you can download them as a .txt file.
- Q. Can I convert JSON to Excel (XLSX)?
- A. Yes. Open Developer Tools and go to the JSON Convert tab. Paste your JSON and select JSON→XLSX. The converted file will download automatically.
- Q. Does background removal upload my image to a server?
- A. No. Background removal is processed by an in-browser AI model. Your image never leaves your device, keeping your files completely private.
- Q. Which languages support the Address Lookup tool?
- A. The Address Lookup tool is available in the Korean locale only, as it is powered by the Korean Ministry of the Interior's official database.