Provides an interactive environment where users can write a regular expression pattern, test it against sample strings, and view real-time match. Everything runs locally in your browser — nothing is uploaded.
Convert time between different time zones. Enter a time and your source/target time zones and see the converted result.
Bidirectional YAML to JSON and JSON to YAML conversion with auto-format detection and real-time preview. Perfect for configuration files, API payloads, and data migration.
Test GraphQL queries with variables. Format queries and variables, and preview formatted responses for development and debugging.
Counts characters with and without spaces and compares your text against platform-specific limits — Twitter/X posts (280), SMS messages (160), SEO meta descriptions (160), Facebook posts (63,206), and LinkedIn summaries (2,600). Real-time counting with space/no-space toggle.
Analyzes your writing with real-time word count, sentence count, syllable count, paragraphs, and advanced readability metrics — Flesch-Kincaid Reading Ease, Grade Level, estimated speaking time, and keyword density. Essential for writers, students, and SEO professionals optimizing content for readability.
Regex Tester lets you provides an interactive environment where users can write a regular expression pattern, test it against sample strings, and view real-time match. Everything runs locally in your browser — nothing is uploaded.. It works on any device with a modern web browser.
Provides an interactive environment where users can write a regular expression pattern, test it against sample strings, and view real-time match. Everything runs locally in your browser — nothing is uploaded. It's ideal for developers, designers, and anyone who needs to provides an interactive environment where users can write a regular expression pattern, test it against sample strings, and view real-time match without installing software or sending data to external servers.
Direct text entry, file upload, or URL-based input — depending on the tool. Paste or type your content directly into the provided editor area.
Yes. After the initial page load, Regex Tester runs entirely on your device with no internet connection needed. All processing is done locally.
Tools cover JavaScript, CSS, HTML, SQL, Python, JSON, XML, CSV, and more. Check individual tool descriptions for specifics.
No. All code processing — formatting, minification, conversion, hashing — runs locally in your browser.
Yes. Since processing is local, performance depends on your device. Most operations handle large files without issue.
Yes. SQL uses sql-formatter, JSON uses native JSON.parse, and other formatters follow widely adopted formatting rules.
Yes. All developer tools work fully offline after the initial page load.
Time Converter
Convert between time units including seconds, minutes, hours, days, weeks, months, and years with precise decimal results.
Diff Checker
Compares two input texts side-by-side, highlighting inserted, deleted, and changed lines with distinct background colors.
JSON Formatter
Pretty-prints raw JSON with configurable indent width, key sorting, and bracket collapsing options while flagging syntax errors with exact.
JS Minifier
Strips comments, whitespace, and shortens local variable names in JavaScript source without altering execution semantics.
Base64 Encode/Decode
Encodes text or small files into Base64 strings and decodes them back with automatic MIME-type detection for binary safety.
Image to Base64
Converts uploaded images (PNG, JPG, GIF, SVG, WebP) into Base64-encoded data URI strings ready for embedding in HTML, CSS, or JSON.