GUETZLI(1)

💖 GUETZLI(1) 💖

okay bestie sit down because guetzli is that girl — a perceptual JPEG encoder and she's literally the moment.

---

✨ NAME ✨

guetzli — perceptual JPEG encoder 🎀

---

✨ SYNOPSYS ✨

yes the original spells it "SYNOPSYS" and we are respectfully keeping that, no notes 💅

guetzli [flags] input_filename output_filename

---

✨ DESCRIPTION ✨

ok so Guetzli is a JPEG encoder whose whole vibe is excellent compression density at high visual quality. That's the mission. That's the assignment. And she ATE. 🔥

Guetzli-generated images are typically 20-30% smaller than images of equivalent quality generated by libjpeg. Like… same quality, way smaller file. Iconic behavior, honestly. 👑

One thing tho — Guetzli generates only sequential (nonprogressive) JPEGs due to faster decompression speeds they offer. So don't come for her about progressive, that's a deliberate choice, not a bug. fr fr.

---

🌸 OPTIONS 🌸

• --verbose — print a verbose trace of all attempts to standard output. every attempt, bestie, she's telling you everything 🗣️✨
• --quality Q — visual quality to aim for, expressed as a JPEG quality value. that's your target vibe check 💅
• --memlimit M — memory limit in MB. Guetzli will fail if unable to stay under the limit. Default is 6000 MB. so generous but she will fail on you if you go over, no cap. 😭
• --nomemlimit — do not limit memory usage. feral. unhinged. go off. 💀

---

🦋 AUTHOR 🦋

This manual page was written by ChangZhuo Chen <czchen@debian.org> for the Debian GNU/Linux system (but may be used by others). 🫶 she wrote it for Debian but she's generous like that, sharing with everyone. periodt.

---

k bye babes, go compress something ✨💖

manual page for GUETZLI(1), dated 02/03/2026 🌈⭐💜