Bidirectional converter between Excel spreadsheets (XLSX) and CSV files. Select sheets, choose delimiters, and preview data before converting.
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.
Convert messy CSV or Excel sheets from clients into clean JSON in one batch. Handles missing values, nested rows, and generates strict JSON schemas for 50+ files at once.
Format converters (INI to JSON, JSON to TOML, JSON to Toon, MessagePack/CBOR inspector), data tools (Excel data cleaner, Excel sheet merger, dataset analyzer, data anonymizer), code converters (code to cURL, cURL to code, JSON-RPC builder), and analyzers (HAR file analyzer, log file analyzer, package.json validator, MIME type finder).
Bidirectional converter between iCalendar (ICS) and CSV formats. Migrate events between Google Calendar, Outlook, Apple Calendar, and spreadsheets.
Convert between JSON, CSV, XML, YAML, and Excel data formats. Pick any input and output format — your files never leave your device.
XLSX ↔ CSV Converter lets you bidirectional converter between Excel spreadsheets (XLSX) and CSV files. Select sheets, choose delimiters, and preview data before converting.. Everything runs inside your browser — nothing is uploaded to a server. It works on any device with a modern web browser.
Bidirectional converter between Excel spreadsheets (XLSX) and CSV files. Select sheets, choose delimiters, and preview data before converting. It's ideal for developers, designers, and anyone who needs to bidirectional converter between excel spreadsheets (xlsx) and csv files without installing software or sending data to external servers.
Direct text entry, file upload, or URL-based input — depending on the tool. Common file formats are supported for upload-based tools.
Yes. After the initial page load, XLSX ↔ CSV Converter 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.
Regex Tester
Provides an interactive environment where users can write a regular expression pattern, test it against sample strings, and view real-time match.
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.