Best Products Built with JavaScript (Free) in 2026
12 free javascript products, ranked by community upvotes.
CodeBurn
Local, free CLI to track AI coding token usage and cost across tools and agents
Calculators Solutions
Free responsive online calculator for basic arithmetic with history and exports
FlowPick
Privacy-first browser extension to detect and download HLS/DASH, video, audio & images.
VPN Leak Test
Instantly check for IP, DNS, WebRTC, and IPv6 leaks—one-click VPN test.
Cicada
Minimal circular progress/percentage UI demo built with HTML/CSS/JS
neo Rename
AI-powered batch media renamer for WordPress to improve image SEO using your own AI API.
OverflowGuard
Prevent layout breakage by designing around content, not fixed breakpoints.
Read in Romaji
Adds romaji readings to Japanese webpages locally in your browser.
midi editor
Browser MIDI editor: piano roll, tempo/time signature, SoundFont, WAV/MP3 export
Shipcheck
Local CLI that scans JS/TS and MCP repos for launch risks and sensitive metadata.
Private Toolkit
Convert images, video and text in-browser — nothing is uploaded.
Subreddit Gallery Viewer
View any subreddit as a customizable image gallery with instant downloads