TIFF Compression Methods Explained — LZW, ZIP, JPEG, PackBits & WebP
- TIFF supports LZW, ZIP, JPEG, PackBits, and CCITT compression internally
- LZW and ZIP are lossless; JPEG mode is lossy; CCITT is for black/white only
- WebP beats all TIFF internal methods for web use — 85-99% smaller files
- Keep TIFF for print and archiving; use WebP for the web
Table of Contents
TIFF files support six major internal compression algorithms: Uncompressed, LZW, ZIP (Deflate), JPEG, PackBits, and CCITT. Each makes a different tradeoff between file size, compatibility, and quality. For web delivery, none of them come close to what converting to WebP achieves — but understanding each method helps you know which to use when staying in the TIFF ecosystem.
Uncompressed TIFF: The Archival Default
Uncompressed TIFF stores every pixel value with no modification. A 24-megapixel RGB image takes exactly 24 million pixels x 3 channels x 8 bits = approximately 69MB. There is zero quality loss because nothing is discarded.
Uncompressed TIFF is used for archival storage and print production masters where any data loss is unacceptable. The downside: enormous files that are impractical for sharing or web use. Software compatibility is universal — any application that supports TIFF can read uncompressed TIFF.
LZW Compression: The Most Common TIFF Setting
LZW (Lempel-Ziv-Welch) is the most widely used TIFF compression method. It is completely lossless — meaning the decompressed file is bit-for-bit identical to the original. LZW works by replacing repeated sequences of bytes with shorter codes.
Typical reduction: 30-50% for photographic images, 50-70% for images with large solid-color areas, 70-90% for line art and text-heavy images.
Photoshop defaults to LZW when you choose "LZW" in the TIFF save dialog. It is compatible with virtually all TIFF-reading software. The limitation: it is still a TIFF file, so browsers cannot display it natively, and it is far larger than WebP for web use.
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ZIP compression (also called Deflate) is lossless like LZW but typically achieves 5-15% better compression on photographic content. It uses the same algorithm as .zip archive files.
Available in Photoshop, GIMP, and most professional imaging tools. Less universally compatible than LZW — some older TIFF readers do not support Deflate-compressed TIFF. For maximum compatibility, use LZW; for maximum compression within TIFF, use ZIP.
Neither LZW nor ZIP approaches WebP compression. A ZIP-compressed TIFF that is 40MB is still 40MB — a WebP version of the same image at quality 85 will typically be under 2MB.
JPEG, PackBits, and CCITT: Specialized Uses
JPEG compression in TIFF: Yes, TIFF can store JPEG-compressed data internally. This is lossy compression — some image data is permanently discarded. The result is smaller than LZW/ZIP but with the quality tradeoffs of JPEG. It is rarely used because if you want JPEG quality, you are usually better off just saving as JPG.
PackBits: A simple run-length encoding scheme that predates LZW. Very fast to compress and decompress, but achieves minimal compression on photographic content (often 0-20% reduction). Common in older systems and fax workflows. Mostly obsolete for modern use.
CCITT Group 3 and Group 4: These are designed exclusively for bilevel (black and white) images — no grayscale, no color. Used in fax transmission and scanned document workflows. CCITT Group 4 achieves excellent compression on black-and-white scans. Completely inappropriate for photographic content.
How WebP Compares to All TIFF Methods
For web delivery, WebP is not competing with TIFF compression — it wins by a different order of magnitude:
| Method | Typical Size vs Uncompressed | Lossless? | Browser Support |
|---|---|---|---|
| Uncompressed TIFF | 100% | Yes | None |
| LZW TIFF | 50-70% | Yes | None |
| ZIP TIFF | 40-60% | Yes | None |
| WebP (quality 85) | 5-15% | No (visually lossless) | All modern browsers |
| WebP (lossless) | 30-50% | Yes | All modern browsers |
For print production and archiving: use LZW or ZIP TIFF. For anything displayed on a screen: convert to WebP. These are complementary workflows, not competing ones — keep your TIFF masters for print, use WebP for everything web.
Convert TIFF to WebP — Better Than Any TIFF Compression
WebP delivers 85-99% smaller files than any TIFF compression method, with no visible quality loss on screen. Free, no upload.
Open Free TIFF to WebP ConverterFrequently Asked Questions
Should I use LZW or ZIP compression for TIFF?
Use LZW for maximum compatibility with all TIFF-reading software. Use ZIP (Deflate) if you need slightly better compression and your software reliably supports it. Both are lossless — no quality difference between them.
Is LZW compression the best way to compress a TIFF?
LZW is the best lossless option within the TIFF format. But if your goal is web delivery, converting to WebP achieves 5-10x better compression than LZW while remaining visually lossless on screen.
Can I apply JPEG compression inside a TIFF file?
Yes, TIFF supports JPEG compression internally. But this is lossy and rarely used in practice. If you want JPEG-level compression, you are usually better off converting to WebP (smaller, better quality) or JPG (universal compatibility).
What does "tiff compression on or off" mean in Photoshop?
In Photoshop's TIFF save dialog, "compression" refers to the internal compression method. "Off" means uncompressed — maximum compatibility, maximum file size. "LZW" is the standard lossless option. For web use, ignore all TIFF compression options and convert to WebP instead.
