What is the Black & White Image tool?
Convert colour images to grayscale for cheaper printing, cleaner document scans or an artistic look. The threshold mode creates pure black-and-white images that are perfect for photocopy-ready documents and signatures.
How to use Black & White Image
- Drop images.
- Choose grayscale, threshold or sepia.
- Download.
Why use this black & white image?
- Save colour ink when printing
- Clean up scanned documents and signatures
- Create artistic photos
Tips for the best results
- Start from the largest, sharpest original you have — compressing an already tiny photo reduces quality.
- Crop unnecessary background before resizing so the subject stays clear.
- Check the final KB and pixel size shown under each file before uploading to a portal.
Works well with
People who use the Black & White Image often need these tools too:
- Image to Text (OCR) — Extract text from photos, screenshots and scanned documents in Bangla and English using free OCR that runs in your browser.
- Image Size Reducer (KB) — Reduce any photo to an exact size in KB — 20KB, 50KB, 100KB or any target — for job applications, exam forms, passports and visas.
- Image Converter — Convert images between JPG, PNG, WebP, HEIC, AVIF, BMP, TIFF, GIF, SVG and ICO in bulk — free, fast and 100% in your browser.
- Photo & Signature Resizer — Resize your photo to 300×300 px (≤100KB) and signature to 300×80 px (≤60KB) — the exact sizes required by Teletalk and most Bangladeshi job portals.
Key features
Private by design: how this converter works
Unlike typical online converters that upload your file to a remote server, this Black & White Image converter processes everything on your own device using the HTML5 Canvas API with an adaptive compression algorithm. Your file is read into browser memory, converted, and offered back as a download — it is never sent to us.
- No upload wait — conversion starts instantly, even on slow mobile data.
- Private — safe for NID copies, certificates, bank statements and personal photos.
- No limits — no daily quota, no queue and no watermark.
- Offline-ready — once loaded, many tools keep working without internet.
Frequently asked questions
What is threshold mode?
It turns every pixel pure black or white, like a photocopy — great for signatures.
Is Black & White Image free to use?
Yes. It is completely free, with no account, watermark or usage limit.
Does it work on mobile phones?
Yes. It is fully responsive and works in all modern mobile browsers. You can also add it to your home screen as an app.