File Tools
Work with files without uploading them: compute a file's hash, create or inspect a ZIP archive, convert a file to and from Base64 and look at its basic properties. They suit developers and everyday users who handle downloads, attachments or documents they would rather keep private.
9 tools
Popular tools
File Inspector
Drop a file to see what it really is: detected type, size, checksums, header bytes and warnings when the extension lies.
File Tools
File to Base64 Converter
Drop a file and get its Base64 string or a data: URL you can paste into HTML, CSS, JSON or an API request.
File Tools
Base64 to File Converter
Paste Base64 or a data URL, click decode, and download the original image, PDF, archive or any other file.
File Tools
Create ZIP Online
Drop your files, pick a compression level and download a single .zip built right in your browser.
File Tools
Extract ZIP Online
Open a .zip, review its contents and download the files you want, with built-in protection against dangerous archives.
File Tools
ZIP Viewer
Look inside an archive: every entry with size, compressed size, ratio, date and flags, plus warnings for anything suspicious.
File Tools
All tools in this category
Frequently asked questions
Are my files uploaded to a server?
No. The file is read by your browser and processed in memory on your device. You can even disconnect from the network after the page loads and the tools will keep working.
Is there a maximum file size?
Each tool shows its own limit. Because everything is held in browser memory, very large files can be slow or fail on devices with little RAM, so try smaller files first.
Does a matching hash mean a file is safe?
No. A matching hash only shows that the file is identical to the one the checksum was made from. It says nothing about whether that file is harmless, so also make sure the reference hash came from a trusted source.