Compress Image Under 5 MB

Need to compress image under 5 MB? This tool uses adaptive quality binary search to hit the target size precisely. Full-resolution sharing and email attachment limits requires staying under 5 MB, and overshooting triggers platform rejection, quality degradation, or upload failures. The engine iterates JPEG quality (90 → 80 → 70 → 60...) until output fits under 5 MB, preserving maximum quality within the constraint. If the target is impossible for the source dimensions (e.g. a 50 MP photo compressed to 100 KB), the tool falls back to the lowest viable quality and warns you rather than silently degrading quality below acceptable thresholds.

• 15 MB is the hard limit for full-resolution sharing and email attachment limits — overshooting means rejection, re-encoding, or upload failures.
• 2Adaptive quality means we calculate the perfect quality setting per image, instead of fixed settings that overshoot or undershoot. A simple graphic might hit 5 MB at q90; a complex photo might need q60 — both stay under the limit.
• 3Local processing keeps your image private — nothing uploaded to any server. Critical for confidential business content, personal photos, and GDPR compliance.
• 4Works for JPEG, PNG, WebP, BMP, and GIF inputs — output is always JPEG for maximum compression ratio across universal formats.
• 5Binary search converges on the target in 3-5 iterations, typically under 1 second total even on mobile hardware.
• 6Pre-compressed images upload 90-99% faster than raw camera photos. On slow mobile connections, this is the difference between a successful post and the 'upload failed' loop.
• 7If the target is impossible (e.g. very large image at very small target), the tool warns you and produces the smallest viable output rather than silently degrading quality below acceptable thresholds.
• 8Reproducible: the same input always produces the same output (no random quality loss). Useful for batch workflows and automation.