Free Online Converters
Convert files and data between formats instantly — no uploads, no sign-up, no software to install.
JPG to PNG Converter
Convert JPG images to lossless PNG.
PNG to WebP Converter
Convert PNG images to smaller WebP.
JPG to PDF
Convert JPG and PNG images into a single PDF.
Base64 Encoder
Encode text to Base64 (UTF-8 safe).
Base64 Decoder
Decode Base64 back to readable text.
URL Encoder
Percent-encode text for safe use in URLs.
URL Decoder
Decode percent-encoded URLs back to text.
Case Converter
Convert text to UPPERCASE, lowercase, Title Case, camelCase and more.
Timestamp Converter
Convert Unix timestamps to dates and back.
Free Online Converters that respect your privacy
Our free converters handle the most common everyday conversions: images between JPG, PNG and WebP, images into PDF, and developer data such as Base64 and URL encoding. Every converter runs entirely in your browser, so your files and data never leave your device. That makes the process private, fast and free, even for sensitive documents and photos.
Every tool runs in your browser — nothing is uploaded.
Frequently asked questions
Are these converters free?
Yes — every converter is completely free with no limits or sign-up.
Are my files uploaded?
No. All conversion happens locally in your browser, so your files stay private.
Explore more collections
Looking for something specific? Browse all Crystal Toolkit tools or view tools by category.