Guides, tips, and tutorials for file conversion and developer tools.
Convert iPhone HEIC photos to universally compatible JPG format. No upload required — your photos stay on your device.
Create perfect favicon ICO files from PNG images. Everything you need to know about favicon sizes, formats, and best practices.
Combine multiple PDF documents into one file for free. No upload, no sign-up — merge PDFs privately in your browser.
Extract audio tracks from video files for free. Convert MP4 to MP3 directly in your browser — no software required.
Convert Excel spreadsheets to CSV format for databases, APIs, and data tools. Free, instant, and completely private.
Convert between JSON and YAML formats for Kubernetes configs, CI/CD pipelines, and development workflows.
Generate QR codes for URLs, Wi-Fi, contacts, and more. Free, instant, no account needed.
Decode and inspect JWT tokens safely. Understand JWT structure, claims, and debugging tips.
Generate strong, cryptographically random passwords. Browser-based — your passwords never leave your device.
Learn what Base64 encoding is, how it works, and when to use it. Plus a free online encoder/decoder.
Understand the privacy risks of uploading files to online converters and why local processing is the safer choice.
Discover file conversion tools that process everything locally. Convert anything, upload nothing.