Text • Images • Private
Base64 Encode / Decode
Encode text or images to Base64 and decode Base64 back. Runs entirely in your browser.
Encode text or images to Base64 and decode Base64 back. Runs entirely in your browser.
Convert text and images to Base64 strings, or decode Base64 back to readable text and image previews. Useful for data URIs, email embeds, and debugging.
Base64 Encode / Decode is designed for everyday tasks where speed and simplicity matter. Whether you are handling a single file or working through a batch, ConvertMastery keeps the workflow straightforward with clear settings and instant downloads.
Create CSS/HTML data URIs. Debug encoded API fields. Embed small images without hosting. These are among the most common reasons users choose this tool on ConvertMastery.
For the best outcome, start with a high-quality source file when possible. If you are preparing images for the web, consider converting to WebP or compressing after conversion. For documents, review the output before deleting originals. When privacy matters, prefer settings that strip metadata and use browser-based processing when available.
ConvertMastery is updated regularly to support modern formats and browsers. If you need help, visit our documentation guide or browse related tools linked below. Processing is private and on-the-fly — results are not saved to our servers.
UTF-8 text and common image formats.
ConvertMastery processes files locally in your browser whenever possible. Your images, documents, and media are not uploaded to our servers for conversion or compression. This privacy-first approach keeps your data on your device and reduces exposure to third parties.