This content originally appeared on DEV Community and was authored by Nattee Kotsomnuan
Hey Dev Community 
I recently built Base64Kit — a clean, fast, privacy-focused tool for Base64 encoding and decoding directly in your browser. It supports both text and files (like images and PDFs), drag & drop, instant preview, and no ads or tracking whatsoever.
And here’s the best part — We just scored a perfect 100 on Google PageSpeed Insights!
Mobile Score:
Performance: 100
Accessibility: 98
Best Practices: 100
SEO: 100
Why it matters:
I designed Base64Kit with:
Instant client-side performance (no server calls)
Full privacy (everything stays in your browser)
Dark/light mode toggle
Clean UX without distractions
RSS Feed & open-source roadmap coming soon
If you’re working with Base64 or just love simple tools that do one thing well, check it out → Base64Kit
Would love feedback, suggestions, or collaboration!
https://pagespeed.web.dev/analysis/https-base64kit-com/h786xw6gc3?form_factor=mobile
Cheers 
This content originally appeared on DEV Community and was authored by Nattee Kotsomnuan