Image Compressor & Converter
Compress or convert images in your browser. Files never leave your device.
Drop images here or click to browse
Up to 20 images · 25.0 MB each · JPG, PNG, WebP, GIF, BMP, AVIF
Files stay on your device — nothing is uploaded to our servers.
How to compress or convert images
Reduce file size or change format in three steps — all locally in your browser.
Professional Output Ready.
Upload your images
Drag and drop up to 20 photos or screenshots. Each file can be up to 25 MB.
Choose settings
Pick compress or format conversion. Adjust quality when compressing — original image dimensions are preserved.
Download results
Review per-file size savings in the queue, then download individual files or a ZIP of all processed images.
Frequently Asked Questions
Are my images uploaded to TeachQuill servers?
No. All compression and conversion happens entirely in your browser. Your files never leave your device, which keeps student photos and classroom materials private.
What image formats can I compress or convert?
You can upload JPEG, PNG, WebP, GIF (first frame), BMP, and AVIF. Output formats include JPEG, PNG, and WebP. AVIF output is available when your browser supports it.
Can I convert iPhone HEIC photos?
HEIC/HEIF is not supported in the browser yet. Export the photo as JPG from your Photos app or Files app, then upload it here.
How does compression work?
Choose Compress and adjust the quality slider. Images keep their original dimensions — only encoding quality changes to reduce file size.
Is this tool free for teachers?
Yes. The image compressor and format converter is free with no login required — the same as our Markdown to HTML tool.