Regex Tester vs Bleacon

Pasted a log line and got zero matches? When a valid pattern finds nothing, tap Check prefix: the app tries up to 32 shorter versions of your pattern on the same text and shows the longest prefix that does match and where — a clue, not a proof of the exact failing token. When it can't tell (alternation, lookaround, backreferences, several places), it says so. Then step through matches one tap at a time with context, UTF-16 ranges and numbered groups. Test patterns on your device with Dart's ECMAScript regular-expression engine. See highlighted matches, positions and capture groups. Toggle ignore case, multiline and dot all; preview replacements with capture groups. Save named favorites with flags and recall recent successful patterns. Code examples are available for JavaScript, Python, Dart, Java, Kotlin, Swift, Go, PHP and Ruby. Other engines may behave differently. This app does not execute or validate those engines. Copy is disabled for unsupported cross-engine syntax or flag combinations; verify examples in your target runtime. Browse 45 reference patterns and 10 sample texts. Reference content includes Korean. Email, URL and similar patterns are learning examples, not security or complete input validation. Matching runs in a cancellable background task with a 500 ms time limit. Limits: pattern 2,000 UTF-16 units, text/replacement 20,000 units, first 500 matches and 100,000 units of result data/output. Partial results are labelled; their total is unknown and replacement is unavailable. Simplify your input if a limit is reached. Core matching, replacement, favorites and history work offline. No ads or tracking prompt. Share only when you tap Share; sharing uses your selected app. Copied text goes to your device clipboard. English controls; reference content includes Korean.

Unlock the full potential of Bluetooth Low Energy with Bleacon, the essential toolkit for developers, engineers, and power users. Whether you are debugging a new hardware product, testing mobile app connectivity, or searching for a lost peripheral, Bleacon provides a clean, native experience designed for maximum efficiency. Key Features - Advanced BLE Scanning: Effortlessly discover nearby Bluetooth LE devices. View detailed lists of both named and unknown peripherals, check connectability, and explore available services at a glance. - Comprehensive Debugging: Connect to any device to read, write, and subscribe to characteristics. Inspect primary services and monitor real-time data flow to streamline your development process. - Peripheral Simulation (Advertise): Turn your iPhone into a BLE peripheral. Advertise custom services and notify values to test how your other apps or devices handle incoming data. - Distance & RSSI Radar: Use the intuitive visual signal tracker to locate devices. Bleacon uses real-time RSSI signal strength to estimate distance, helping you find lost tags or calibrate hardware placement. Built for the Community Bleacon is a passion project built by a solo developer with a focus on transparency and utility. - No Ads: Stay focused on your work without intrusive interruptions. - No Tracking: Your data and scan results are your own. We respect your privacy. - Always Free: Professional-grade tools accessible to every developer. - Simplify your BLE workflow today with Bleacon.