Convert between case styles, CSS preprocessors (SCSS/Less/Stylus), HTML/JSX, number bases, serialization formats (YAML/INI/TOML/JSON), and time zones. One tool for all text transformations. Files are converted locally in your browser — nothing is uploaded.
Content reviewed October 2026 · About Toolzum
Convert a single Markdown document to styled HTML or plain-text PDF with three built-in themes. One document at a time — local Marked + jsPDF, free, no signup.
Convert data between JSON, CSV, XML, YAML, and TSV with structure preserved. Migrate configs across stacks without rewriting — local PapaParse/xml2js/yaml parsing, free, no signup.
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.
Beautify or minify HTML, CSS, JavaScript, XML, ERB, LESS, and SCSS with a single click. HTML, CSS, JS, XML, and more normalize in one pass — local processing, free, no signup.
Auto-detect language and format mixed code snippets — JS, CSS, HTML, JSON in one paste. Clean Stack Overflow answers before using — local processing, free, no signup.
A workbench of text utilities — case, diff, encode, count, and clean in one place.
Chain transforms without shuttling text between separate tools.
Handles long documents without freezing the browser tab at all.
No — everything runs locally in your browser, free with no signup.
JSON to XML
Converts JSON files to XML format — APIs, configuration files, and data exchange between web services to enterprise systems, SOAP APIs, document formatting, and legacy integration pipelines.
Archive Converter
Create ZIP archives from your files right in your browser. Bundle loose files into one archive.zip with DEFLATE compression — local JSZip work, unlimited saves.
MKV to MP4
Convert MKV video files to MP4 format directly in your browser. 100% free, private — your files never leave your device.
EPUB to PDF
Converts EPUB files to PDF format — e-readers, mobile devices, and accessible digital books to document sharing, printing, and archival with consistent formatting. All conversion happens locally in your browser with no file size limits.
MP4 to MKV Converter
Converts MP4 files to MKV format — universal video playback on any device to advanced video archiving with multiple subtitle tracks, chapters, and audio streams in one file. All conversion happens locally in your browser with no file size limits.
MP4 to MOV Converter
Convert MP4 video files to MOV format directly in your browser. 100% free, private — your files never leave your device.