Image Compressor
Fine-tune quality, chroma subsampling, and palette reduction for GIF/WebP while keeping visual fidelity.
Crunching batch...
Drop images or ZIPs you want leaner
HEIC, AVIF, RAW, animated GIF/WEBP, TIFF, and DDS textures are all supported.
Compression queue
- Add assets to estimate percentage savings and see the before/after file size.
Compression controls
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Original uploads are discarded as soon as we finish calculating compression results.
Original weight
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Optimized weight
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Compressed files appear here with side-by-side metrics and download buttons.
An image compressor reduces the byte size of an image file by re-encoding its pixels with a more efficient encoder, with or without discarding visual information. Smaller files mean faster web pages, lower bandwidth bills, and more breathing room in cloud storage and email attachments. The right compression mode and quality setting depend entirely on the format of the source file and where the output is going to be used.
What is an Image Compressor and How Does It Work?
An image compressor takes the raw pixel grid of a source image, runs it through a format-specific encoder, and writes a new file that represents the same picture using fewer bytes. There are two compression modes:
- Lossy compression (JPG, lossy WEBP, AVIF) discards visual information that the eye is least sensitive to, mostly fine color detail in chroma channels. The file is smaller but the original cannot be reconstructed exactly. Quality is controlled by a numeric factor, typically 1 to 100.
- Lossless compression (PNG, lossless WEBP, TIFF) reorganizes the same pixels using more efficient encoding (filtering, prediction, entropy coding). The file is smaller but every pixel can be reconstructed bit-for-bit identical to the source.
Picking the right mode is the single most important decision: lossy on a screenshot of crisp text will smear edges, and lossless on a photograph will produce a file barely smaller than the original. The compressor exposes a quality slider for lossy formats and a lossless toggle for formats that support both modes.
Why You Need an Image Compressor for Your Projects
Image bytes dominate the page weight of most websites. Compressing images before they ship to a server, a CMS, or a CDN has direct, measurable effects:
- Faster page load and better Core Web Vitals: the Largest Contentful Paint metric is almost always an image on content sites. Cutting hero image weight by 60 to 80 percent typically shaves a full second off LCP.
- Lower bandwidth and CDN costs: egress is billed per gigabyte. Halving image weight halves the per-visitor cost on every page that contains those images.
- Better mobile experience on capped data plans: a 4 MB hero image is roughly 1 percent of a 500 MB monthly mobile plan; the same image at 400 KB is 0.1 percent.
- Cheaper storage and faster backups: a photo library of 10,000 images at 4 MB each is 40 GB; the same library compressed to 800 KB each is 8 GB.
- Email and chat attachments stay under size limits: Gmail caps at 25 MB, Outlook at 20 MB, WhatsApp documents at 100 MB. A handful of camera-original JPGs can blow through those limits; compressed versions usually fit.
When Should You Use Image Compression?
Compress before publishing, never after. Original camera RAWs and master PSDs should stay archived at full quality. The compressed version is a derivative made for a specific destination: web pages get WEBP or AVIF, email attachments get medium-quality JPG, in-app thumbnails get heavily compressed JPG, archive copies stay in PNG or TIFF. Recompressing an already-compressed JPG repeatedly causes generation loss, where artifacts compound with every save.
Key Features of an Effective Image Compressor
The features that actually matter for serious work are the ones that affect the output bytes:
- Per-format quality control: JPG quality 82 is roughly equivalent to WEBP quality 78 and AVIF quality 65 for the same visual fidelity. A good compressor exposes the slider per format, not as a single number.
- Lossless mode for formats that support it: PNG, TIFF, and WEBP can be compressed without any quality loss; the encoder just works harder to find redundancies.
- Metadata stripping: EXIF, XMP, and ICC blocks routinely add 30 to 100 KB to every photograph. Stripping them is mandatory for public web images and for screenshots that may contain GPS data.
- Batch processing: compressing 50 product photos one by one is busy-work; running them through the same settings at once is the actual job.
- Animation handling: animated GIFs and animated WEBPs need to be re-encoded as a sequence of frames, with timing and loop count preserved.
- Color profile preservation: ICC profiles describe how the file's RGB values map to actual colors on screen. Stripping them silently shifts colors, which matters for product photography and brand assets.
Practical Use Cases for Image Compression
E-commerce stores compress product photography to keep catalog pages under the 2.5-second LCP threshold that Google rewards. Web developers run hero images and inline article images through a compressor as part of every deploy. Photographers compress client galleries and proof sheets so previews load quickly without exposing the full-resolution masters. Marketing teams compress screenshots and infographics before posting to LinkedIn or Twitter, since both platforms strip and re-encode oversized uploads anyway. SaaS engineers compress every avatar, every empty-state illustration, and every onboarding screenshot, because each kilobyte multiplies across every visitor.
Whether you are publishing a photo to a website, attaching screenshots to a support ticket, or archiving a phone-camera library to the cloud, an image compressor is the step between source and destination. The right format and the right quality setting almost always shrink the file by a factor of three to ten with no perceptible quality loss, and that compression compounds across every visitor, every page, and every gigabyte of storage.
FAQ
For typical phone or DSLR JPGs, a quality setting of 80 to 85 cuts file size by 50 to 70 percent with no visible difference at normal viewing distance. Re-encoding the same source as WEBP usually saves another 25 to 35 percent on top, and AVIF saves more still at the cost of slower encoding.
JPG quality 80 to 85 is the sweet spot for photographs displayed on a web page. Below 70, JPG starts showing block artifacts in skies and skin tones. Above 90, the file gets noticeably larger without any visible improvement. WEBP and AVIF can drop 5 to 15 points lower than JPG and still look identical.
No. The compressor reads the source file, produces a new compressed file, and returns it as a download. The original on your device or server is never modified. Keep the original archived if you may need to re-export at different settings later.
Yes. PNG is a lossless format, so all PNG compression is lossless by definition. The compressor uses the highest deflate setting (compression level 9) to squeeze out every redundant byte. Typical savings on hand-authored PNGs are 10 to 40 percent; on screenshots they are often higher.
Yes, if they came directly from a camera or phone. Camera firmware is tuned for capture quality, not web delivery, and saves at quality 95 or higher. Re-encoding to quality 82 typically halves the file with no perceptible difference. Avoid recompressing images that have already been heavily compressed for the web; further compression compounds artifacts.
Almost always because the WEBP was saved at a higher quality factor than the JPG. WEBP and JPG quality numbers are not directly comparable: WEBP at 90 is roughly equivalent to JPG at 95, not JPG at 90. Drop the WEBP quality to 75 to 80 and it will usually win.
Indirectly, yes. Search engines do not score image compression directly, but they score Core Web Vitals (LCP, INP, CLS), and image bytes are the dominant factor in LCP for content-heavy pages. Compressing images is one of the highest-leverage things you can do to improve those metrics.
EXIF metadata, IPTC tags, and ICC color profiles are preserved by default whenever the target format supports them. The compressor exposes a separate option to strip metadata before export, which is recommended for publicly published photos and for screenshots that may contain GPS coordinates or system information.
Yes. Animated GIFs are decoded as a sequence of frames with their original timing and loop count. The compressor re-encodes each frame using an adaptive 256-color palette and reassembles the animation with the timing intact. Re-encoding to animated WEBP usually shrinks the file by another 60 to 80 percent compared to optimized GIF.
Each file must be under 40 MB, and each batch can contain up to 50 files. ZIP archives are unpacked server-side and each entry counts against the same 50-file limit. For larger workloads, split into multiple batches; the compressor settings persist between batches.