The best Compressor.io alternative takes 50 images at once instead of 10, opens iPhone HEIC files, converts to WebP or AVIF, and holds an exact size like 100 KB, all on the free tool. Free, no signup. For SVG and GIF files, Compressor.io stays the better pick.
✓50 images a batch
✓Exact size like 100 KB
✓HEIC and AVIF in
✓WebP and AVIF out
✓No signup
By Sahadat Husain, who builds Blinkimg.·Compressor.io facts checked on its own pages on 2 October 2026.
Output format
– / –
Drop images or browse
JPEG · PNG · WEBP · AVIF · HEIC · up to 50 at once · max 30 MB each
HEIC
PNG
JPEG
AVIF
WEBP
Advanced settings1 on
SmallerAutoBetter
Auto tunes each image.
A hard cap for the number your form demands.
KB
A floor for forms that refuse small files.
Max resolution
×
Empty side keeps the ratio. Never enlarges.
Original · 9.8 MB
AVIF · 97.1 KB
−99%
A real result from the engine above: the same photograph, 9.8 MB in, 97.1 KB out as AVIF. Compress the same photo on Compressor.io and compare the two.
The short answer
Why Blinkimg is the best Compressor.io alternative
Compressor.io compresses well and keeps it simple. Blinkimg does the jobs around compression that it leaves out: bigger batches, other formats, iPhone photos and a size you set.
01Images a batch
50Compressor.io: 10
A folder in one drop
Compressor.io's free tool stops at 10 files a drop and 50 a day. Blinkimg takes 50 at once and 300 a day.
02Exact size
YesCompressor.io: No
One pass to 100 KB
No Compressor.io plan has a target. Our 576.8 KB test JPEG came back at 99.7 KB under 100 KB.
03Formats out
4Compressor.io: Same as in
WebP and AVIF on demand
Compressor.io never changes the format. Our test photo measured 123.9 KB as AVIF against 273.9 KB as JPEG.
04iPhone HEIC
YesCompressor.io: No
Straight from the phone
Compressor.io refuses HEIC. Our 1,956 KB HEIC became a 940.7 KB JPG.
05Largest free file
30 MBCompressor.io: 10 MB
Camera files fit
Compressor.io takes 10 MB free and 20 MB on Pro. Blinkimg takes 30 MB free and 90 MB on Pro.
06Quality and resize
FreeCompressor.io: Pro
Control without paying
On Compressor.io, choosing a quality and resizing are Pro. On Blinkimg both are on the free tool.
Compressor.io, fairly
What Compressor.io does well, and where it stops
Compressor.io is a clean, free compressor with real strengths. Its limits are about volume, formats and what is free.
What Compressor.io does well
✓
SVG and GIF
It compresses SVG and GIF on the free tool, files Blinkimg, TinyPNG’s free tool and Squoosh do not take.
✓
Lossless on free
Lossy or lossless, without paying. Its lossless mode, by its own words, suits print.
✓
A ZIP and a slider
Download All returns every result at once, and a before and after slider shows the change.
✓
Reads the real format
It checks the file itself, not the name, and flags an extension that does not match.
✓
A cheap Pro for one person
$50 a year for resize, quality, rename, 100 files a drop and no ads, with a seven-day refund.
Where Compressor.io stops
✕
10 files a drop, 50 a day
A folder of 60 photos takes six drops on one day and the rest on the next.
✕
No conversion, HEIC or AVIF
Files come back in their own format. iPhone photos and AVIF are refused.
✕
No size target
A form’s 100 KB limit means trying quality steps on Pro, or resizing, and checking.
✕
Control is Pro
Choosing a quality, resizing, renaming and keeping EXIF all need Pro.
✕
API and plugin coming soon
Its features page has listed the developer API and the WordPress plugin as coming soon.
Feature by feature
Compressor.io vs Blinkimg: every limit, side by side
Each Compressor.io cell is quoted from its home, pricing, features, privacy and terms pages, read on 2 October 2026; each Blinkimg cell is a limit the tool enforces. Green matches or beats the other side, amber has it with a condition, red lacks it, grey means the site states nothing.
Blinkimg Free
Compressor.io Free
Limits
Images at once
50a batch
10a drop100 on Pro
Images a day
300signed out
50a dayunlimited on Pro
Largest file
30MB each
10MB each20 MB on Pro
Formats
Opens
✓JPG, PNG, WebP, AVIF, HEIC
✓JPG, PNG, WebP, GIF, SVG
Saves as
✓JPG, PNG, WebP, AVIF
✓The same format it got
iPhone HEIC
✓To any of the four
✕Refused
SVG and GIF
✕Not accepted
✓Compressed
Control
Quality control
✓Auto, or a slider
✓Lossy or losslessquality steps on Pro
Exact KB target
✓Yes, never over
✕No, on any plan
Resize
✓Width and heightnever enlarges
✓Pro only
Before and after
✓A slider on each result
✓A slider
Beyond compression
Download all
✓One ZIP
✓One ZIP
Editor
✓Crop, colour, censor, text
✕No
Images to one PDF
✓Yes, A4 pages
✕No
Developer API
✓500 free credits a month
✕Coming soon
Privacy
Files deleted
✓Within 24 hours
✓After compressingno time window stated
EXIF and GPS
✓Stripped by defaultor kept, free
–Not stated on freekept on Pro
Advertising cookies
✓None
✓Yesads and remarketing
Signup
✓None
✓None
Measured, not claimed
What our engine does with the files people bring
Every figure is a file our engine produced. Compressor.io’s terms forbid automated use, so we did not run it; compress the same file on both and compare the bytes yourself.
A 576.8 KB JPEG photo, 1920 × 1280
Original576.8 KB
JPG, Auto273.9 KB
AVIF123.9 KB
WebP218.9 KB
JPG under 50 KB48.7 KB
A 4,096.3 KB photo saved as PNG
Original4,096.3 KB
PNG, Auto994.3 KB
JPG, Auto273.9 KB
AVIF123.9 KB
Auto is the setting the tool opens with. The JPG capped at 50 KB came back at 48.7 KB, −91.6% from the original, in one pass.
Reference file576.8 KBphoto.jpg
Target
Relative to source
Size
Saved
JPG under 100 KB
99.7 KB
−82.7%
JPG under 50 KB
48.7 KB
−91.6%
WebP under 100 KB
98.4 KB
−83.9%
JPG, AutoOur default
273.9 KB
−52.5%
Source: photo.jpg, 576.8 KB, 1920×1280, our reference photo, under the targets people search for on Compressor.io. One pass each, never over.
Tip 1
Type the limit, not a quality
A form asks for a size, not a quality. A target gets there in one pass; quality steps need checking.
Tip 2
Try AVIF for the web
Our test photo measured 123.9 KB as AVIF against 273.9 KB as JPEG. Every current browser shows it.
Tip 3
Judge at 100%
Compare both results at full size. If you cannot see a difference, keep the smaller file.
Every byte count is the size of the actual file our engine produced from the named source, the same bytes you would download, not an estimate. The reference photo is one of our own photographs, an iguana on a branch, and the camera photo is a real one too. Drop your own file into the tool above to rerun any of them. How we measure names the sources and the settings.
The alternatives
Sites like Compressor.io: the best alternatives
The tools people use instead, including the three Google’s AI Overview names for this search, each described from its own website. Ours comes first.
01 · Best for batches, conversion and exact sizes
BlinkimgOur pick
Blinkimg compresses and converts 50 images a batch at 30 MB each, opens HEIC and AVIF, writes WebP and AVIF, and holds any size in KB you type, with quality and resize free. No signup.
Batch
50 images
Largest free file
30 MB
Writes
JPG, PNG, WebP, AVIF
Price
Free; Pro $2.50/mo
✓An exact KB target, never exceeded
✓HEIC in; WebP and AVIF out
✓An API with 500 free credits a month, and an MCP server
Squoosh is the open-source app from Google Chrome Labs. It compresses one image at a time in your browser, with a live before-and-after and codecs such as AVIF, MozJPEG, OxiPNG and JPEG XL.
Optimizilla, now at imagecompressor.com, compresses JPEG, PNG, WebP, GIF and SVG in your browser and lets you adjust each image before you save it. It states no daily limit.
ShortPixel is a WordPress-first optimizer with Lossy, Glossy and Lossless levels. Its online tool takes JPG, GIF and PNG up to 10 MB, more once you log in.
Runs
On its servers
Batch
Not stated
Largest file
10 MB signed out
Free plan
100 credits a month
✓A Glossy level between lossy and lossless
✓Generates WebP and AVIF copies
✓Compresses PDF files too
✕10 MB cap until you log in
✕No target size in KB
✕Its pages disagree on retention: 30 minutes or 2 hours
ImageOptim is a free, open-source Mac app. It compresses without losing quality by default, strips EXIF and GPS, and handles JPEG, PNG, SVG and animated GIF.
Caesium is a free, open-source desktop app for Windows and macOS that compresses JPG, PNG, WebP and TIFF in batches. Its online version takes 10 files of 20 MB.
XnConvert is a batch converter for Windows, Mac and Linux. It reads more than 500 formats, RAW and HEIC included, with over 80 operations and watch folders.
Compressor.io's facts come from its own pages; ours are the limits the tool enforces and the files the engine produced.
Q:What is the best Compressor.io alternative?
For a file under an exact size, iPhone HEIC photos, WebP or AVIF output, or more than 10 files a drop, Blinkimg: 50 images at 30 MB each, free with no signup. For SVG and GIF files, which Blinkimg does not take, Compressor.io is still the better tool.
Q:Is Compressor.io free?
Yes, with no account: 10 MB a file, 10 files a drop and 50 compressions a day, with Google ads on the page. Choosing a quality, resizing and keeping EXIF are Pro only. Blinkimg's free tool takes 50 images a batch and 300 a day, with a quality slider and resize included.
Q:How much does Compressor.io Pro cost?
$50 a year for one user, by its pricing page; two users cost $100. No monthly price is shown, and it offers a seven-day full refund. Pro raises files to 20 MB and 100 a drop, removes the daily cap and the ads, and adds quality, resize and rename settings.
Q:Can Compressor.io compress an image to 100 KB?
No. No plan has a target size: Pro offers quality steps from 20 to max and resizing, and you check the result. Blinkimg takes a target in KB or MB on the free tool; our 576.8 KB test JPEG came back at 99.7 KB under 100 KB and 48.7 KB under 50 KB.
Q:How many images can Compressor.io compress at once?
10 a drop on the free tool and 100 on Pro, by its own app messages, with Download All as one ZIP. Several ranking pages still say one at a time, which describes the old site. Blinkimg takes 50 images a batch on the free tool, also back as one ZIP.
Q:Can Compressor.io convert images to WebP or AVIF?
No. It compresses JPEG, PNG, SVG, GIF and WebP and returns each file in its own format; the tool has no output-format setting on any plan. Blinkimg compresses and converts in one drop, writing JPG, PNG, WebP or AVIF from any of five formats in.
Q:Does Compressor.io support HEIC photos from an iPhone?
No. Its tool refuses anything but JPG, PNG, SVG, GIF and WebP, and it reads the real format, so renaming does not help. Blinkimg opens HEIC and saves it as JPG, PNG, WebP or AVIF; our 1,956 KB iPhone photo became a 940.7 KB JPG.
Q:Is Compressor.io safe? Does it keep my images?
Its pricing page says every uploaded image is deleted after being compressed and that it keeps nothing on its servers, though it gives no time window. Its privacy policy lists Google Analytics, advertising cookies, remarketing and data transfer to the United States. Blinkimg deletes each file within 24 hours and sets no advertising cookies.
Q:Does Compressor.io have an API or a WordPress plugin?
Not yet. Its features page lists both as coming soon. Blinkimg has a REST API with 500 free credits a month that holds an exact byte target, and an MCP server so Claude, ChatGPT or Cursor can compress images for you.
Q:Can Compressor.io compress PDF or video files?
No. It accepts five image formats only, and none of its pages mentions PDF or video, despite the searches for both. Blinkimg does not compress PDFs or video either; it turns images into a PDF, with each page sized to stay under a limit you set.
Q:Does Compressor.io compress without losing quality?
In its Lossless mode, which it says shrinks a picture by 5% to 20% and suits print; its recommended Lossy mode cuts up to 95%. Both work on the free tool. Blinkimg’s Auto is lossy by design; it keeps every pixel only at quality 100.
Q:Does Compressor.io keep or remove EXIF data?
Keeping EXIF is a Pro checkbox, and what the free tool does with EXIF and GPS is not stated. Blinkimg strips EXIF and GPS by default on every plan, applies the photo’s rotation first, and keeps the metadata when you tick Keep EXIF.
Q:Is Compressor.io good for SVG and GIF?
Yes, and that is its clearest edge. It compresses SVG and GIF on the free tool, lossy or lossless, which Blinkimg, TinyPNG’s free tool and Squoosh do not offer. If your files are mostly logos and animations, Compressor.io is the better pick.
Q:Why trust a Compressor.io comparison that Blinkimg wrote?
Because you can check each line. Every Compressor.io fact is quoted from its own home, pricing, features, privacy and terms pages, read on 2 October 2026, and linked below. Where it states nothing, the page says so. Where it wins, on SVG, GIF and lossless, the page says that too.
