TOOLS
Small, focused tools — free, private and no sign-up.
Cybersecurity
8Privacy-first micro-tools hosted at tools.yongchivo.com. The client-side ones never send your data anywhere.
- Password Generator (opens tools.yongchivo.com in a new tab) Create strong, random passwords entirely in your browser.
- Password Strength Analyzer (opens tools.yongchivo.com in a new tab) Check how resistant a password is to cracking — nothing leaves your device.
- Subnet Calculator (opens tools.yongchivo.com in a new tab) Work out network ranges, masks and hosts from any CIDR block.
- Security Headers Checker (opens tools.yongchivo.com in a new tab) Paste a URL and audit its HTTP security headers in seconds.
- Breach Checker (opens tools.yongchivo.com in a new tab) Find out if an account appears in known data breaches.
- Which Cyber Role Are You? (opens tools.yongchivo.com in a new tab) A quick quiz to find your fit: pentester, SOC analyst, forensics and more.
- EXIF Viewer (opens tools.yongchivo.com in a new tab) See the hidden metadata in a photo — camera, timestamp, even GPS location. 100% in your browser.
- PDF Metadata Editor (opens tools.yongchivo.com in a new tab) Inspect and strip the hidden metadata in a PDF — author, software and timestamps.
File Converter
41Free, private file conversion that runs entirely in your browser.
Most popular
Analytics
3Upload a platform export and read it the way it should have been shown to you — all in your browser, nothing uploaded.
- Google Search Console Analyze a Queries or Pages CSV export: summary totals, a sortable table, a CTR-vs-position scatter and a ranking distribution — plus two-file comparison.
- App Store Connect Analyze a Sales and Trends or App Analytics export: downloads and proceeds over time, the conversion funnel, day-of-week performance and source breakdown.
- Google Play Console Analyze an Installs, Store performance or Earnings report: installs and uninstalls over time, the store listing funnel, net earnings and day-of-week performance.