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
DATA HANDLING BEFORE YOU STARTCore processing stays in this browser; signed-in features store service metadata such as account, quota and jobs, not copies of your work files.
View handling details Loading tool workspace…
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.
FREE + PROStart free and upgrade when the workload grows.Free: 5 conversions per rolling 24 hours, 25 MB/file and 3/batch. Pro: 300 per 30 days, 50 MB/file and currently 50/batch, plus advanced naming, templates and priority processing.
Compare Free & Pro DATA HANDLING DETAILSOpen the full data boundary when you want the implementation details.
Full data handling matrix Processed in this browserCore file processing runs on this device; the work files do not need to be uploaded to FileNest first.
File contents are not uploadedWork files stay on this device for this tool; outputs are generated or downloaded within the browser workflow.
Service metadata ≠ file copiesSigned-in features may store account, quota, job, download or saved-rule records; those records do not contain copies of your work files.
Practical 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.