Shrink Images: Compress, PNG↔JPG, WhatsApp
Compress JPG/PNG/WebP, pick formats for email vs transparency, and tame huge WhatsApp sends without mush.
Best tools for this task
These are the converters we would actually use after writing this. No filler—just the pieces that match what people land here trying to do.
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Compress Image
Reduce JPG, PNG, WebP size
- PNG to JPG
- JPG to PNG
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Image to PDF
Turn images into searchable PDFs
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PDF to JPG
Convert PDF pages to JPG images
- Images to Searchable PDF
Smaller images mean faster pages, fewer bounced emails, and less pain on mobile data. This page covers compression, when to swap PNG↔JPG, transparency headaches, and the “WhatsApp made my proof fuzzy” situation—without pretending there’s a perfect preset for every photo.
Why reduce image file size
Large images slow down websites and can exceed email attachment limits. Compressing reduces file size so you can share or upload more easily. Slight quality loss is normal; the goal is to find a balance where the image still looks good but the file is smaller. For photos, JPG at 80–85% quality is often a good balance. PNG is for graphics or when you need transparency; compressing PNG can still shrink size.
How to reduce image file size
- Open a free Image Compressor (e.g. our online tool).
- Upload your image (JPG, PNG, or WebP). Check the tool’s size limit (e.g. 20MB).
- Choose quality if the tool offers it: medium or 80–85% for photos; higher for graphics if you need sharpness.
- Compress. The tool outputs a smaller file. Preview before you use the result.
- Download the compressed image. Your original is not stored.
PNG vs JPG (and when to convert)
Photos → JPG almost always wins on size. Logos, screenshots with sharp text, or anything needing alpha → PNG. Cross the streams with PNG to JPG when you need a smaller attachment, or JPG to PNG when you finally admit you need transparency. Neither format loves being compressed twice—start from the original if you still have it.
WhatsApp and client proofs
Chat apps recompress aggressively. If someone needs to read fine print, send the file another way or attach a slightly smaller but still sharp image—compress once yourself so the app doesn’t mangle it twice. I’m biased toward “sharp enough to verify,” not “smallest possible blob.”
Tips for best results
Use our Image Compressor with a quick preview. JPG around 80–85% is a sane default for photos. Downsizing width (e.g. ~1200px for web) often beats cranking quality to zero.
Frequently Asked Questions
Will compression reduce quality?
It can, depending on the level. Light compression keeps quality high; aggressive compression shrinks more but may introduce artifacts. Preview and choose a level you’re happy with.
JPG or PNG for smaller size?
For photos, JPG usually gives smaller files at similar visual quality. PNG is better for graphics, text, or when you need transparency; it can still be compressed.
Is the compressor free?
Yes. ConvertFloor’s Image Compressor is free. No signup; files are deleted after download.
How much smaller will my file be?
It depends on the image and quality setting. Often 30–60% reduction is possible for photos without obvious quality loss. Try and preview to see.
See also: images → one PDF and shrink PDFs when the attachment isn’t a photo.
Compress images free
JPG, PNG, WebP. Reduce size, keep quality. No signup.
Use Image CompressorMore reading
Same topic, different angle—handy when this page answered one question but not the whole story.
- How to Reduce PDF File Size Shrink PDFs for email, uploads, and storage—compression levels, quality trade-offs, and when to split instead.
- Combine Images into One PDF (Single or Batch) One photo or many: searchable PDFs with OCR, order, limits, and when Image to PDF is enough.
- Is Online PDF Converter Safe? What to look for in a safe PDF converter: HTTPS, retention, and why “free” is not the same as “risky.”
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