JB Toolbox

JB Toolbox brings essential network utilities, QR and barcode tools, everyday converters, and quick games into one app. Check your connection and troubleshoot networks: • View public and local IP addresses • Run Ping tests and review latency, packet loss, and stability • Scan a LAN for devices on your local network • Look up IP addresses for a domain with DNS • Test whether a TCP port is open • Inspect SSL certificate validity, expiry dates, and TLS security • Calculate subnet ranges, masks, broadcasts, and usable hosts Create, scan, and convert: • Generate QR codes for text, URLs, Wi-Fi, and contacts • Create barcodes in multiple formats, then save or share them • Scan QR codes and barcodes with the camera or an image • Count characters, words, and lines, or change text case • Calculate SHA-256, SHA-384, SHA-512, SHA-1, MD5, and CRC32 for text or files, then compare an expected checksum • Generate passwords with length and character options • Convert length, mass, area, volume, temperature, speed, data, time, and pressure • Convert Unix timestamps in seconds or milliseconds to dates and times, and convert between time zones Hash and checksum calculations run only on your device. Entered text, selected files, file paths, and results are not added to History. Add tools to favorites. For tools that support History, restore previous inputs, copy details, or export history as CSV. Need a quick break or a simple group decision? Play Sudoku with notes, undo, pause, and autosave, or use the Ladder Game to match participants with results. JB Toolbox is designed for IT staff, developers, technicians, students, and anyone who wants practical tools in one clear interface. Date and time conversions run on your device. Inputs and results are not saved to History. This app contains banner ads.