Why image compression still matters in 2026
The average webpage ships about 2 MB of images. An uncompressed photo from a modern smartphone can hit 8–12 MB. Even on fast connections, oversized images slow page loads, trigger Core Web Vitals penalties, and burn mobile data allowances. The fix is always the same: compress before you publish.
Most free compressors cap you somewhere: 500 KB per file (TinyPNG free), 20 images per session, or no support for iPhone's HEIC format. AT USE compresses images up to 20 MB each, handles HEIC natively, puts no limit on how many files you run, and never watermarks the output. No account required.
When to compress images online
You need an image compressor any time you're moving files from a high-quality source to a destination with size constraints:
- Blog posts and CMS uploads — WordPress recommends images under 100 KB for fast load times. A DSLR original fresh off camera is typically 8–15 MB.
- Email attachments — most corporate mail servers reject attachments over 10 MB. Compressing photos first keeps them in the acceptable range.
- Social media — Instagram resamples images wider than 1080 px and applies its own compression. Compressing to the right dimensions before uploading avoids double-compression artefacts.
- iPhone photos in HEIC — HEIC has been iOS's default photo format since iOS 11. Many online tools still don't accept it. AT USE does, at up to 20 MB per file.
- Product photography batches — migrating a catalogue with 200 product images means 200 potential oversized files. Run the batch, compress, download.
What the AT USE compressor handles
AT USE compresses JPEG, PNG, WebP, AVIF, HEIC, BMP, TIFF, and ICO — up to 20 MB per file, with no cap on the number of files you run in a session. Processing is server-side: no browser-side JavaScript tricks that quietly degrade quality below what the slider shows.
The output format stays the same as the input. Compress a JPEG, get a JPEG back. If you also want to change formats while you compress — for example, converting a JPEG to AVIF for the best compression ratio at equivalent quality — use the JPG to AVIF converter instead and let AT USE handle both steps in sequence. To convert to WebP instead, the JPG to WebP converter gets you 25–35% smaller files with broad browser support. For compressing and resizing multiple images at once with a ZIP download, the Image Optimizer handles up to 12 files per batch.
Step-by-step: how to compress images with AT USE
The whole process takes under a minute per batch.
- Open the tool. Go to AT USE Image Compressor. Nothing to install or sign in to.
- Upload your image. Drag a file into the drop zone or click to browse. Accepted formats: JPEG, PNG, WebP, AVIF, HEIC, BMP, TIFF, ICO. Max 20 MB per file.
- Set the quality level. The quality slider defaults to 80, which is a reliable starting point for web images. For product photography where sharp edges matter, try 85–90. For social media thumbnails where detail loss is less visible, 70–75 usually produces the best file-size reduction.
- Click Compress. Server-side processing completes in seconds for most files. Larger files — 10–20 MB HEIC photos, for example — may take 5–15 seconds.
- Check the result. The tool shows original size, compressed size, and reduction percentage. If the reduction isn't enough, lower the quality slider and run it again.
- Download. Click the download button. The file arrives with no watermark and no account prompt.
Reading the compression result
A well-compressed JPEG from a smartphone original typically drops 40–70% at quality 80. PNG compression is lossless by default and usually achieves 10–30% reduction. If the result shows under 5% reduction, the source file was likely already compressed at origin — many images downloaded from social platforms or stock sites are already heavily optimised.
| Format | Typical reduction at quality 80 | Notes |
|---|---|---|
| JPEG (camera original) | 40–70% | Largest gains on unedited smartphone photos |
| PNG (screenshots, logos) | 10–30% | Lossless; reduction depends on original optimisation |
| WebP | 15–40% | Quality slider affects lossy WebP; lossless WebP gains less |
| HEIC (iPhone photos) | 20–60% | Highly variable by scene complexity |
| AVIF | 10–30% | Already an efficient format at source; recompression gains are smaller |
AT USE vs TinyPNG: the free plan comparison
TinyPNG is the most widely cited free image compressor. Its free plan has three specific limits worth knowing about before you hit them:
- File size: TinyPNG free caps each file at 500 KB. AT USE accepts files up to 20 MB — the difference between accepting and rejecting a full-resolution iPhone photo.
- Format support: TinyPNG handles PNG, JPEG, WebP, and AVIF. AT USE adds HEIC, BMP, TIFF, and ICO — useful for anyone working with iPhone originals, legacy BMP assets, or favicon files.
- File count: TinyPNG free allows 20 images per session. AT USE has no file count limit per session and no paid tier — there is no ceiling to unlock.
TinyPNG's paid plans start at $39 per year and raise the size limit to 75 MB. If you need more than 20 MB per file or HEIC support, the free alternative is AT USE.
For most workflows, the free-plan comparison comes down to a single question: is the file over 500 KB? If it is — a raw smartphone JPEG almost always is — TinyPNG's free tier will reject it. AT USE will process it up to 20 MB. No account, no paid tier, no ceiling to unlock.