Clean signatures for forms
A photo of a signature on paper often has grey shadows. Black and white removes them, so the signature stays crisp and the file becomes very small, ideal for 10KB to 20KB limits.
Black & White Image Free
Convert an image to black and white. Ready to upload.
Make every pixel black or white. Move the threshold to keep faint lines or clean up grey paper.
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Black & White Image in 3 steps
- 1 Add an image.
- 2 Move the threshold until the preview looks clean.
- 3 Download.
Why use Black & White Image on 108pdf
Black & White Image runs entirely in your browser. Your file is opened by your own device, processed there and saved back to you, so it is never uploaded to a server and never stored by us. That makes it safe for ID cards, exam forms, contracts and any other document you would rather keep private.
There is no account to create, no watermark on the result and no daily limit. You can process as many files as you like, one after another, and the tool keeps working even on a slow connection once the page has loaded.
If the result is not what you expected, change the options and run Black & White Image again on the same file. Nothing is lost, and your original file is never touched. Use the related tools below to continue the job, for example to resize, convert or merge the output.
Questions people ask
Are my files uploaded to a server?
No. 108pdf processes this file inside your browser using your own device. Nothing is sent to our servers, so there is nothing to delete afterwards and nothing that can leak.
Is this tool free?
Yes. It is free with no sign-up, no watermark and no daily limit.