Built on advanced on-device AI and hardware acceleration to deliver professional-grade performance with uncompromising privacy.On-device AI — professional-grade, fully private.
Compress Images Online Free
Reduce file size by up to 90% — sharp results, free.
- Runs on your device
- Adjustable quality · Live size preview
- One image free · Batch (Pro)
- JPG, PNG, WebP, AVIF
Shrink file size by up to 90% with a live quality-and-size preview.
Drop images here
or browse · one image on Free
Supports JPG, PNG, WebP, GIF, BMP, AVIF
Target size picks the quality for you and never goes over the limit you set.
The result is never larger than this. If a size cannot be reached by quality alone, the image is scaled down to fit.
WebP and AVIF reach a size limit at a higher quality than JPEG.
Free compresses one image at a time.
Free exports up to 4096px on the longest side
Why Compress Images?
Every unoptimized image on a webpage adds weight that slows down load times, hurts Core Web Vitals scores, and costs mobile users extra data. A typical uncompressed product photo from a modern smartphone is 4–8 MB — compressed correctly to WebP at 75% quality, it drops to under 300 KB with no visible change. That difference translates directly to faster page loads, lower bounce rates, and better search rankings. This tool compresses JPG, PNG, and WebP images with no queues — free up to 25 MB per image, and Pro lifts the cap.
Benefits of Image Compression
- Faster page load times:: Images account for 50–70% of a typical webpage's total weight. Cutting image sizes by 60–80% directly reduces Time to First Contentful Paint — the metric Google uses to measure perceived speed.
- Higher search rankings:: Google's Core Web Vitals scoring directly rewards fast-loading pages. Optimized images improve LCP (Largest Contentful Paint) and CLS scores, contributing to higher organic rankings.
- Lower storage and bandwidth costs:: Serving compressed images reduces CDN bandwidth consumption and cloud storage costs — significant at scale for e-commerce sites and media-heavy platforms.
- Better mobile experience:: Mobile users on 4G average 20–50 Mbps compared to 100+ Mbps on desktop. Smaller images load faster on mobile networks and consume less of users' data plans.
- Smaller email attachments:: Most email providers cap attachments at 25 MB. Compressing images before attaching reduces bounce risk and keeps inboxes from hitting storage limits.
How Image Compression Works
Image compression works by finding and removing data that either duplicates information already present in the image or falls below the threshold of human visual perception. Lossy compression (used by JPG and WebP) permanently discards fine detail and color variation that the human eye cannot distinguish at normal viewing distances — at quality 75–80%, most viewers cannot tell a compressed image from the original. Lossless compression (used by PNG) reorganizes pixel data more efficiently without discarding anything — it is slower and produces larger files than lossy, but is essential for images with sharp text, logos, or transparency where any quality loss would be visible.
Compression Formats Compared
- WebP: Google's modern format achieves 25–35% smaller file sizes than JPEG at equivalent visual quality. Supported by all major browsers since 2020 — the best default choice for web images.
- JPEG / JPG: The most universally compatible format, ideal for photographs. Excellent at compressing continuous-tone images like portraits and landscapes. Does not support transparency.
- PNG: Lossless compression preserves every pixel — essential for images with transparency, sharp text, or diagrams. PNG files are larger than JPG or WebP for photographs, but smaller for flat graphics.
Best Practices for Image Compression
Getting the smallest file size without visible quality loss comes down to three decisions: format, quality setting, and whether to resize before compressing. These guidelines cover each.
Quality Setting Guide
- 85–100% (high quality):: Use for hero images, product detail photos, and print exports where sharp fine detail matters. File sizes will still be smaller than the original but not dramatically reduced.
- 70–85% (web standard):: The sweet spot for most web images. At 75%, a typical JPG or WebP is 50–70% smaller than the original with no visible difference on screen at normal viewing sizes.
- 50–70% (aggressive):: Suitable for thumbnails, social media previews, and decorative backgrounds where file size matters more than sharpness. Compression artifacts may be visible on close inspection.
- Below 50% (maximum compression):: For cases where file size is the only priority — icon previews, blurred backgrounds, or low-resolution placeholders. Visible quality loss is expected.
When to Use Each Format
- Use WebP for all web images where maximum browser compatibility is not a constraint — delivers the best size-to-quality ratio of any widely-supported format.
- Use JPEG when the receiving system requires JPG specifically (many e-commerce platforms, CMS uploads, and API endpoints) or when the image is a photograph with no transparency.
- Use PNG when the image contains transparency, has sharp text or UI elements, or must be identical to the source after compression (lossless).
Image Compression Facts
These numbers come from Google's Web Almanac, HTTP Archive, and published browser performance research. They illustrate how much impact image optimization has on real-world web performance.
Key Statistics
- Images account for 55% of the total bytes transferred on the average webpage (HTTP Archive, 2024).
- WebP delivers 25–35% smaller files than JPEG at equivalent quality — Google's own benchmarks across 12,000 images.
- A 1-second improvement in page load time increases conversions by 7% on average (Akamai / Deloitte research).
- Google's LCP threshold for a 'Good' Core Web Vitals score is under 2.5 seconds — uncompressed hero images are the top cause of LCP failures.
- Mobile users on 4G connections load pages 2–3× slower than desktop Wi-Fi users — image optimization has proportionally greater impact on mobile.
- Re-compressing an already-compressed JPEG degrades quality progressively — always compress from the highest-quality original available.
Common Use Cases
Image compression is one of the highest-impact optimizations across web development, e-commerce, digital marketing, and content creation. Here are the most common workflows and what settings work best for each.
Website and Blog Optimization
Web developers and content managers use image compression to reduce page weight and improve Core Web Vitals scores. For blog post images and article photography, compress to WebP at 75–80% quality. For hero banners and full-width backgrounds, use 80–85% to keep visual sharpness. The target is any image over 150 KB — most unoptimized photos from cameras or stock sites come in at 1–5 MB and can be cut to under 200 KB with no visible change.
E-Commerce Product Images
Product pages carry the highest image loads on e-commerce sites — a typical product listing page loads 20–40 images. Compress product photos to WebP at 78–82% quality for the best balance between sharpness and speed. Marketplace platforms like Amazon and Shopify impose their own compression on upload, but starting with a compressed image prevents double-compression artifacts. For white-background product photos, PNG compression often produces cleaner edges than JPEG.
Social Media and Content Creation
Instagram, Twitter, Facebook, and LinkedIn all recompress images on upload, so starting with an already-compressed image avoids double-compression artifacts. Compress social images to 80–85% WebP before uploading — the platform's secondary compression will degrade quality less when starting from a controlled baseline. For story and portrait formats (1:1 or 9:16), compress at higher quality since the subject fills more of the frame and detail is more visible.
Email Campaigns and Attachments
Email service providers impose strict limits on image sizes — most cap individual attachments at 25 MB and recommend email template images under 1 MB total. Compress email template images to 65–75% WebP or JPEG — at typical email viewing sizes (300–600px wide), this quality setting produces images that are indistinguishable from the original. For attachments like design mockups or event photos, compress to 70–75% quality to fit within provider size limits without requesting approval for large-file transfers.
Frequently Asked Questions
How much can I reduce an image file size without visible quality loss?
With quality settings between 70–80%, most JPG and WebP images can be reduced by 50–80% with no visible difference to the human eye. PNG files compress less aggressively with lossy methods, but converting to WebP at 75% quality typically cuts PNG file sizes by 40–60%. The right setting depends on how the image is displayed — thumbnails tolerate lower quality than hero images or product detail photos.
What quality setting should I use when compressing images for a website?
For most websites, 70–80% quality gives the best balance between file size and sharpness. At 75%, a typical JPEG or WebP shrinks by 60–70% compared to the original with no perceptible difference on screen. Use 80–85% for large hero images or product photos where fine detail matters, and 65–72% for blog thumbnails, background images, and decorative photos.
Can I compress PNG images without converting them to JPG or WebP?
Yes — the PNG stays a PNG and keeps its transparency. PNG has no quality dial, so this tool shrinks it by reducing how many colours the image stores; at the highest setting the colours are left untouched. On photographs the savings are modest (typically 10–30%) compared with converting to WebP. If your PNG does not need transparency, converting to WebP at 80% quality will typically cut the file size by 40–65% while preserving nearly identical visual quality.
Why is my compressed WebP file larger than the original JPEG?
This happens when the source JPEG was already heavily compressed, and re-encoding at a higher quality setting produces a larger output. Try lowering the quality slider to 65–75% or match the approximate compression level of the source. WebP's size advantage over JPEG is most pronounced on original, uncompressed, or lightly compressed source images — it cannot 'undo' compression that has already been applied.
Does compressing an image multiple times degrade quality each time?
Yes — for lossy formats like JPG and WebP, each re-compression cycle removes additional data and degrades quality progressively, known as generation loss. Each compression pass introduces new artifacts on top of the previous ones. Always compress from the highest-quality original available and avoid re-compressing already-compressed images. PNG with lossless compression does not have this problem since it never discards pixel data.
What is the difference between lossy and lossless compression?
Lossy compression (JPEG, WebP) permanently removes image data that falls below the threshold of human visual perception — it achieves the largest file size reductions (50–90%) but the changes are irreversible. Lossless compression (PNG, GIF) reorganizes data without discarding any — the output is pixel-identical to the original, but size reductions are smaller (10–30%). For most web images, lossy compression at 75–80% quality is the right choice. Use lossless only when exact pixel fidelity matters, such as for logos, screenshots with text, or source files.
Is it safe to compress images with this tool?
All compression happens on your device — your images are never sent to a server, so nothing waits in a queue on someone else's machine and nothing is stored anywhere but your own computer. Free compresses images up to 25 MB; Pro works up to whatever your device can handle. Processing speed depends on your device's CPU, not your internet connection.
from 650 ratings
Rate this tool
Tap a star — it takes a second