Regex Tester Pattern Editor vs MobileDB

Test a regular expression on your iPhone and see every match light up the moment you type it. Paste your text, write your pattern, and watch matches highlight character by character — no desktop, no compile step, no guessing. Most regex help on a phone is a static article you read. Regex Tester is a working engine: it runs your pattern with Foundation's NSRegularExpression (the same ICU syntax iOS itself uses), so what you see here is exactly what your app, script, or config will do. Invalid pattern? You get a plain-English reason instead of a cryptic engine dump. WHAT YOU GET - See every match highlighted inside your own test text, updating live as you type - Know exactly what each capture group grabbed — numbered and named, with character ranges - Preview a find-and-replace before you commit it, using $1 / $2 templates on your real text - Flip case-insensitive, multiline, dot-all and ignore-whitespace modes with one tap and watch results change - Start from 19 ready-made patterns for email, URL, IPv4, phone, hex color, ISO date, UUID, JWT and more — searchable and filtered by Validation, Extraction, Web and Format - Look up any token without leaving the app: character classes, anchors, quantifiers, groups, lookaround and replacement templates in a built-in cheatsheet - Bookmark the patterns you keep reusing with their test text and flags, and reload any of them in one tap PERFECT FOR - Developers who need to sanity-check a pattern away from their machine - Data and log wranglers pulling IDs, dates or fields out of messy text - Students and self-taught coders learning regex by seeing it behave, not by reading about it - Anyone writing validation rules for forms, imports or search filters WHY NOT JUST USE A WEBSITE? Online regex testers need a connection, and they want you to paste your text into someone else's server — a hard no when that text is a customer export, a log dump, or anything under NDA. This runs entirely on-device, works on a plane or in a basement, and keeps a keyboard-friendly phone layout instead of a desktop page squeezed onto a small screen. PRIVACY Every pattern, test string and result is processed on your device and stored on your device. No account, no ads, no tracking, no upload — there is no server to send anything to. FULL ACCESS Live matching, the pattern library and the basics of the syntax reference are free to use. Full Access unlocks capture-group inspection with ranges, the live replace-with-template preview, the complete cheatsheet (quantifiers, groups, lookaround, replacement templates and engine notes), and saved patterns. Choose the plan that fits: weekly, yearly, or a one-time lifetime unlock that never renews. Open the Test tab, paste the text that is giving you trouble, and write the pattern that fixes it. Terms of Use (EULA): https://web-levi.web.app/terms Privacy Policy: https://web-levi.web.app/privacy-policy Questions? tphuc.work@gmail.com

MobileDB is a native PostgreSQL client for iPhone and iPad. Connect straight from your device to any Postgres database - over TLS or through an in-app SSH tunnel - and browse, query, and edit your data from anywhere. There is no backend and no account: your credentials live in the iOS Keychain and your data travels only between your device and your own servers. TRY IT INSTANTLY • Tap "Try the Demo" for a built-in sample database - browse tables and explore live dashboards with no account, no server, and no setup CONNECT YOUR WAY • Save multiple connections with passwords and SSH keys secured in the Keychain • TLS modes: require & verify, allow self-signed, or disable for local networks • Built-in SSH tunneling (the app does the ssh -L for you) with trust-on-first-use host-key pinning for databases behind a bastion BROWSE • Schema → table → row navigation with search • Structure view: columns, types, primary-key badges, defaults • Paginated data grid with sorting, sticky column headers, and one-tap refresh • Tap any cell to inspect and copy the full value • Filter by a value, or jump along a foreign key to the referenced row QUERY • SQL editor with autocomplete (tables, columns, keywords) • Query history and saved queries • Export results to CSV or JSON EDIT • Type-aware row editor - toggles for booleans, number pads, date pickers, UUID helpers • Insert, update, and delete keyed on the primary key • Unsaved-changes guard so you never lose an edit by accident DASHBOARDS • Build quick, native dashboards right on your phone - no SQL required • "Total count" for a big-number metric (e.g. total users) • "Count over time" - pick a date column and a window (24h to 12 months) for a trend chart • "Count by category" - a bar chart broken down by any column • Or write custom SQL and pick how to chart it (number, bar, line, or table) • Charts render natively with Swift Charts; refresh a whole dashboard with one tap WORK SAFELY IN PRODUCTION • Tag a connection as Development, Staging, or Production • Production shows an always-on red banner so you always know where you are • Open any connection read-only - the session is read-only and all write UI is hidden • A destructive-statement guard warns before UPDATE/DELETE without WHERE, and TRUNCATE / DROP / ALTER Postgres-only today, with an engine-agnostic core so more databases can follow. MobileDB collects no analytics and shows no ads. It has no servers of its own.