Optimize Images for Email Campaigns
Large images cause emails to clip in Gmail, load slowly on mobile, or get blocked entirely. Graviton compresses your newsletter images to stay under size limits while looking sharp in every inbox.
Email Clients Are Unforgiving
Email is one of the most constrained environments for images. Gmail clips messages over 102KB of HTML. Outlook blocks external images by default. Mobile email clients on slow cellular connections can take several seconds to render image-heavy newsletters. And most email clients do not support modern formats like WebP or AVIF.
When your email images are too large, the consequences are immediate: your message gets clipped, images fail to load, or recipients see a blank placeholder instead of your carefully designed newsletter. These failures directly reduce open rates, click-through rates, and conversions.
Graviton solves this with aggressive compression optimized for email. Compress your newsletter images to email-friendly file sizes, output in universally supported JPG and PNG formats, and process all your campaign assets in a single batch.
Aggressive Compression for Email
Email images need to be as small as possible. Graviton can reduce file sizes by up to 90%, bringing hero banners and product images well under email-friendly size limits without sacrificing the visual impact that drives clicks.
JPG & PNG Output for Maximum Compatibility
Most email clients do not support WebP or AVIF. Graviton outputs JPG for photographs and PNG for graphics with text or flat colors — the two formats guaranteed to render correctly in every inbox.
Quality Balance for Small File Sizes
Fine-tune compression to hit your target file size. For email, lower quality settings (60-75%) produce dramatically smaller files that still look good at the smaller display sizes typical in email layouts.
Bulk Processing for Newsletter Assets
Upload all the images for a campaign — hero banners, product thumbnails, icons, and buttons — and compress them all with the same settings in one batch.
How Marketers Use Graviton
Optimize every image in your next campaign in four steps.
Upload Newsletter Images
Drag and drop your hero banner, product images, icons, and any other newsletter assets. Graviton accepts JPG, PNG, WebP, AVIF, and GIF up to 50MB each.
Compress Aggressively
Set quality to 60-75% for email images. At typical email display sizes (600px wide), these settings produce sharp images at a fraction of the original file size.
Choose JPG or PNG for Compatibility
Select JPG for photographs and product images, or PNG for logos, icons, and graphics with text. These formats are supported by every email client.
Download Optimized Images
Download individual files or grab everything as a ZIP. Drop the optimized images into your email template and send with confidence.
Why Marketers Choose Graviton
Purpose-built optimization for the constraints of email.
Under Email Size Limits
Keep total email weight well under Gmail's 102KB HTML limit. Compressed images reduce overall message size and prevent clipping.
Fast Loading in All Clients
Smaller images render instantly in every email client — Gmail, Apple Mail, Outlook, and mobile apps. No more blank placeholder images.
Gmail-Friendly File Sizes
Gmail displays images inline when they are small enough. Compressed images load without requiring recipients to click 'display images.'
Mobile-Optimized
Over 60% of emails are opened on mobile devices. Compressed images load fast on cellular connections where every kilobyte counts.
Consistent Across Clients
JPG and PNG formats render identically in every email client. No compatibility surprises when your campaign goes out to thousands of recipients.
Bulk Newsletter Processing
Process all images for a campaign in one session. Hero banners, product shots, and icons — compress them all with consistent settings.
Frequently Asked Questions
Keep individual images under 100KB for the best results. Hero banners should be 50-100KB, product thumbnails under 30KB, and icons and buttons under 10KB. The total weight of all images in an email should ideally stay under 800KB to ensure fast loading across all clients and connection speeds.
JPG is the best choice for photographs and product images in email — it is universally supported and produces small files. PNG is better for graphics with text, logos, or flat colors where JPG compression artifacts would be noticeable. Avoid WebP and AVIF in email since many email clients do not support these formats. GIF is supported for simple animations.
Gmail clips emails with HTML content over 102KB (the total HTML, not including images loaded from URLs). For the overall email including remotely loaded images, aim to keep the total under 1MB for fast rendering. Many email service providers recommend keeping the total email size under 600KB for optimal delivery and display.
Hero banners are typically the largest image in an email. Design them at 600px wide (the standard email width) and compress with Graviton at 65-75% quality. This typically produces files of 40-80KB that look sharp in the email layout. Avoid oversized banners — a 1200px-wide image displayed at 600px wastes bandwidth without adding visible quality.
Yes. JPG and PNG images compressed with Graviton render correctly in all versions of Outlook, including Outlook for Windows which uses the Word rendering engine. Stick with JPG for photographs and PNG for graphics. Avoid transparency in Outlook emails since some versions render transparent PNG backgrounds as white or gray.
Send Faster Emails Today
Start optimizing your newsletter images for free. Your next campaign will load faster in every inbox.