How conversion works · Comparison
Compression vs Conversion
Users search “compress image” and “convert image” for overlapping pain. Clarify the goal: stay in JPG but smaller, or leave HEIC for JPG compatibility.
Quick take: Compression reduces size. Conversion changes format. Tools often do both (PNG → smaller WebP), but you can compress within a format or convert without shrinking.
Compression alone
Re-encode JPG at a lower quality, or use a compressor tool that keeps the same format family.
Conversion alone
TIFF → PNG for compatibility may not prioritize size. WAV → FLAC compresses losslessly but also changes format.
Key points
- Compression → smaller.
- Conversion → different format.
- Many workflows need both.
Compression vs Conversion
Compression
- Goal: fewer bytes
- May keep the same format
- Quality settings matter
Conversion
- Goal: different format/compatibility
- Always changes format identity
- May increase or decrease size
Email rejects large attachment
Pick: Compress (and maybe convert to WebP/JPG)
Size is the blocker.
App rejects HEIC
Pick: Convert
Format compatibility is the blocker.
Examples
Compress
Large JPG → smaller JPG via quality slider.
Convert
HEIC → JPG so Windows opens it.
Try it in a converter
Concepts stick better with a real file — processing stays in your browser.
Related concepts
FAQ
Does Format Convertly compress?
Many converters include quality controls that effectively compress during encode. Dedicated compressor tools target size within image workflows.
Browse all conversion concepts or jump to converters.