STEP 01Add files
Choose images; free or Pro limits are checked immediately.
See real byte savings before download
Batch Image Compression & Size Optimization
Choose output quality and format, then see actual dimensions, bytes and savings for each result—never a made-up estimate.
Start using this tool
File contents stay local Review first, then run
STEP 02Choose settings
Set format, ratio, zoom and enhancement with the exact credit cost shown.
STEP 03Review & download
Inspect dimensions, bytes and warnings, then download individually or as a ZIP.
Local browser processing · No uploadsFree standard queue
Drop JPG, PNG or WebP images
Free: up to 3 files, 25 MB each
Conversion, crop, zoom and enhancement all stay on this device0
Free credits leftNo credits used yet
Confirmed before processing: 0 standard credits
Renaming needs no sign-in; quota-based conversion needs a free account and no credit card.
Sign in to a free accountPractical use cases
Less mechanical sorting, more focus
Website performance
Convert to WebP and reduce bytes for faster image loading.
Email attachments
Compress a photo batch before packaging to reduce attachment-limit problems.
Cloud archives
Reduce storage use at a quality level you can inspect and control.
FAQ
Questions before you begin
Why does the quality slider have little effect on PNG?
Browser PNG encoding is normally lossless and may ignore quality. Use WebP or JPG for a larger reduction.
Will it predict savings first?
Actual generated bytes are compared after processing; FileNest does not promise invented savings beforehand.
Can I download everything together?
Yes. Multiple results can be packaged automatically as a ZIP.