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Image Compressor

Compress images locally in your browser in batches, choose target KB or manual quality, use Source, WebP, JPEG, or AVIF output, cap the longest edge, handle HEIC/HEIF input as PNG, and download single files or ZIP.

Drag & drop images here or click to select

Supports PNG / JPEG / WebP / AVIF. HEIC / HEIF input is decoded locally first; Source output becomes PNG.

File count

0 / 10

Total size

0 bytes / 150 MB

Single-file limit

25 MB

Image List (0)

Output Format

Compression Goal

Max Edge

px
Image Compressor

Quick Start

1
Import images: add one or more PNG, JPEG, WebP, AVIF, HEIC, or HEIF files.
2
Choose output: Source, WebP, JPEG, or AVIF.
3
Tune size: choose manual quality or target KB, and set a longest edge for proportional downscaling.
4
Compress batch: process images in your browser and watch progress.
5
Download results: save single files or package successful items as ZIP.

Common Scenarios

Batch compression

shrink multiple product images, web assets, or social media images in one pass.

Email attachments

reduce image size before sending without noticeably hurting quality.

Before sharing

remove EXIF metadata to reduce exposure of location and device details.

Thumbnail output

cap the longest edge to generate lighter preview images for upload and browsing.

Compression Options

Output format: Source keeps the current source format when possible; WebP/JPEG/AVIF exports to the selected target format.
Quality mode: adjust WebP/JPEG/AVIF quality manually; higher values are clearer but larger, with no fixed compression ratio.
Target size: enter a KB goal or pick 50/100/200/500 KB. The tool searches quality settings as best effort.
Max edge: Pixels; empty or 0 means no limit. It scales down proportionally, does not crop or stretch, and does not upscale smaller images.
Metadata: re-encoding usually strips EXIF/ICC/XMP/GPS; this tool has no metadata preservation guarantee.

Usage Advice

Recommended quality: JPEG 70–85, WebP 60–80, AVIF 45–65
For large images or batches, process in smaller groups to avoid running out of memory
Keep the page in foreground during compression; background tabs may be throttled
Format tips: JPEG for photos, WebP/AVIF for smaller size, source format for transparent assets

Limitations & Compatibility

JPEG doesn't support transparency; transparent areas will be filled with white. Use Source PNG, WebP, or AVIF to keep alpha.
Very large images may exhaust memory or be reclaimed by the browser
Colors may shift slightly after compression (color management/ICC differences)
HEIC/HEIF input is decoded locally to PNG first; Source output becomes PNG.
Target size is best effort; very small targets, already-compressed files, PNG/source output, or large dimensions may not reach the KB goal.
There is no lossless mode; compression uses source-format defaults or WebP/JPEG/AVIF quality settings.
Re-encoding usually strips metadata, but there is no metadata preservation or selective metadata editor.

Privacy & Security

Image compression runs in your browser. Selected images stay in page memory while this tool is open. Output format, compression goal, target size, quality, longest-edge, and metadata settings may stay in browser storage; if WebDAV sync is enabled, those settings may sync according to your settings. Image files are not synced by default; they only enter WebDAV attachment sync when you explicitly enable attachment sync. Compressed files are generated for individual downloads or ZIP and are not stored as separate results. On shared devices, clear images, results, saved settings, and site data when needed.

FAQ

6

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All tool processing happens locally in your browser.