Blinkimg is the best Optimizilla alternative. It takes 50 images at once instead of 20, holds an exact size like 100 KB, opens iPhone HEIC files and converts to WebP or AVIF in the same drop, then returns one ZIP. Free, no signup, and every upload is deleted within 24 hours.
✓50 images a batch
✓Exact size like 100 KB
✓HEIC in, AVIF out
✓One ZIP
✓Measured side by side
By Sahadat Husain, who builds Blinkimg.·Optimizilla 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.
A real result
9.8 MB to 97.1 KB, and it looks the same
One camera photo through the engine above, on Auto, saved as AVIF: the original on the left, the result on the right.
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. Run the same photo through imagecompressor.com and compare the two.
The short answer
Why Blinkimg is the best Optimizilla alternative
Optimizilla is a careful, private compressor with a slider on every image. Blinkimg makes smaller JPEGs at the same quality and takes the jobs it sends elsewhere: conversion, HEIC, resizing and a size you set.
01Images a batch
50Optimizilla: 20
No file left behind
Optimizilla skips every file past the twentieth without a message. Blinkimg takes 50 in one drop.
02Same quality, JPEG
293,649 BOptimizilla: 338,719 B
13% smaller at quality 80
At quality 80, Optimizilla's default, our JPEG of our reference photo came out 13% smaller, at 37.6 dB PSNR against its 37.8 dB.
03Exact size
YesOptimizilla: No
One pass to 100 KB
Its own blog says better tools handle the guessing. Our reference photo, a 576.8 KB JPEG, came back at 99.7 KB under 100 KB.
04HEIC and conversion
One dropOptimizilla: Another site
iPhone photos to WebP or AVIF
Optimizilla sends conversion and HEIC to a sister site. Blinkimg does both in the same run as compression.
05Download
One ZIPOptimizilla: File by file
The whole batch at once
SAVE ALL saves each file separately. Blinkimg returns the batch as one ZIP.
06Resize
YesOptimizilla: No
Smaller in pixels too
Set a maximum width and height in the same run. Optimizilla has no resize control.
Optimizilla, fairly
What the Optimizilla image compressor does well, and where it stops
Optimizilla has run since 2014 and now works entirely in your browser. Its limits are about volume, formats and the steps around compression.
What Optimizilla does well
✓
Nothing uploads, since January 2026
Its terms say all processing is performed in your browser, with no server-side processing.
✓
A slider on every image
Auto settings first, then a comparison view, step buttons and a size estimate before you apply.
✓
Careful with JPEG
It reads each JPEG’s own quality and never re-encodes one that is already at or below its target.
✓
SVG and GIF
SVG with a precision control, and GIF and WebP animations kept animated.
✓
Free, no limit a day
No registration, no daily cap, no watermark, and its terms allow commercial use. Sixteen languages.
Where Optimizilla stops
✕
20 files, the rest skipped
Its page caps a batch at 20 and drops the rest without a message.
✕
No conversion or HEIC
Files come back in their own format. WebP, AVIF and HEIC mean a second site.
✕
No size target or resize
A form’s 100 KB limit means moving the slider and reading the estimate, image by image.
✕
Settings per image only
Its how-to: one image’s quality setting does not carry to the others in the batch.
✕
No ZIP, no named operator
SAVE ALL saves file by file. The terms name no company, address or contact.
Feature by feature
Optimizilla vs Blinkimg: every limit, side by side
Each Optimizilla cell comes from imagecompressor.com, its terms, its how-to, its blog or the settings its page serves, 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
Optimizilla
Limits
Images at once
50a batch
20a batchthe rest skipped
Images a day
300signed out
✓No limit
Largest file
30MB each
50MB eachin its page settings
Formats
Opens
✓JPG, PNG, WebP, AVIF, HEIC
✓JPG, PNG, WebP, GIF, SVG
Saves as
✓JPG, PNG, WebP, AVIF
✓The same formatconversion on a sister site
iPhone HEIC
✓To any of the four
✕Not accepted
SVG and GIF
✕Not accepted
✓Compressedanimation kept
Control
Quality control
✓Auto, or one sliderfor the whole batch
✓A slider on each image
Exact KB target
✓Yes, never over
✕No
Resize
✓Width and heightnever enlarges
✕No
PNG photos
✓Palette on Autofull colour at 100
✓Palette by defaultfull colour when it fails its bar
Beyond compression
Download all
✓One ZIP
✓File by file
Editor
✓Crop, colour, censor, text
✕No
Developer API
✓500 free credits a month
–None stated
Privacy
Where it compresses
✓On our serversdeleted within 24 hours
✓In your browsersince January 2026
EXIF and GPS
✓Stripped from every file
✓Stripped when re-encodedkept on unchanged files
Advertising cookies
✓None
✓Named in its termsGoogle ad personalization
Site languages
✓English
✓16
Measured, not claimed
Optimizilla and Blinkimg on the same photos
We ran three photos through the live imagecompressor.com at its own settings and through our engine on 16 October 2026, and kept the exact bytes. PSNR scores each file against the original; higher is closer.
Reference photo, JPEG, 576.8 KB, 1920 × 1280
Optimizilla, its default338.7 KB
Blinkimg JPEG 80293.6 KB
Blinkimg JPEG Auto273.9 KB
Reference photo as PNG, 4096.3 KB, 1920 × 1280
Optimizilla, its default889.8 KB
Blinkimg PNG Auto994.3 KB
At the same JPEG quality ours was 13% smaller, 0.2 dB lower in PSNR. On the PNG photo Optimizilla's palette was smaller and ours kept 1.5 dB more detail.
Reference file576.8 KBphoto.jpg
Tool and setting
Relative to source
Size
PSNR
Optimizilla, its default (target 80)
338,719 B
37.8 dB
Blinkimg, JPEG 80
293,649 B
37.6 dB
Blinkimg, JPEG AutoOur default
273,945 B
37.1 dB
Source: photo.jpg, 576.8 KB, 1920 × 1280, our reference photo, measured on 16 October 2026. Optimizilla ran in Chromium at its own settings; Blinkimg through the engine the tool and the API run.
Reference file9.8 MBthe camera photo
Tool and setting
Relative to source
Size
PSNR
Optimizilla, its default (target 80)
752,829 B
42.8 dB
Blinkimg, JPEG 80
668,029 B
42.3 dB
Blinkimg, JPEG AutoOur default
605,510 B
42.0 dB
Source: the camera photo, 9.8 MB, 4964 × 2782. The same runs.
Reference file4096.3 KBphoto.png
Tool and setting
Relative to source
Size
PSNR
Optimizilla, its default
889,778 B
35.9 dB
Blinkimg, PNG AutoOur default
994,313 B
37.4 dB
Source: photo.png, 4096.3 KB, 1920 × 1280, the same photo saved as PNG. Both write a palette PNG here.
Finding 1
Smaller JPEGs, same detail
At quality 80 our JPEG was 13% smaller than Optimizilla's, at 37.6 dB PSNR against its 37.8 dB, and Auto went smaller again.
Finding 2
Its PNG palette is smaller
On the PNG photo Optimizilla saved more bytes; ours kept a little more detail. Both are palette files.
Finding 3
Auto aims at detail on big photos
On the camera photo Optimizilla kept 0.8 dB more; our Auto file was 20% smaller.
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 Optimizilla: the best alternatives
The tools people use instead of Optimizilla, each described from its own website. Ours comes first; two others also keep your files on your device.
01 · Best for big batches, conversion and exact sizes
BlinkimgOur pick
Blinkimg compresses and converts 50 images a batch at 30 MB each, opens HEIC, writes WebP and AVIF, resizes, holds any size in KB you type and returns one ZIP. No signup.
Batch
50 images
Largest free file
30 MB
Writes
JPG, PNG, WebP, AVIF
Price
Free; Pro $39 a year
✓An exact KB target, never exceeded
✓HEIC in; WebP and AVIF out, in one drop
✓Metadata stripped from every file it returns
✓Every upload deleted within 24 hours
✓AI metadata remover built in
✓A WordPress plugin on the same credits, thumbnails free
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.
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.
Pick by how many images, the size you need and where the files must stay. Three of the six picks are not ours.
More than 20 images
BlinkimgOur pick
50 images a batch, none skipped, back as one ZIP.
A form with a KB limit
BlinkimgOur pick
Type 100 KB once. The file lands at or under it, in JPG, PNG, WebP or AVIF.
iPhone photos to WebP or AVIF
BlinkimgOur pick
HEIC in, any of four out, in one drop. Our reference photo saved as a 343.0 KB HEIC became a 267.4 KB JPG.
A slider on every image, nothing uploaded
OptimizillaorSquoosh
Both work in your browser. Optimizilla takes 20 at once; Squoosh one, with deeper settings.
Logos and animations
OptimizillaorCompressor.io
Both compress SVG and GIF; Optimizilla keeps animations animated.
Hundreds of files, offline
ImageOptimorCaesium
Desktop apps for whole folders: ImageOptim on a Mac, Caesium on Windows and macOS.
Edge cases
The awkward files, answered
What each side does with the files that trip compressors up. Where Optimizilla states nothing, the card says so.
Thirty photos at once
Blinkimg
One batch of 30, back as one ZIP.
Optimizilla
The first 20 are compressed; the other 10 are skipped without a message.
A form that wants under 100 KB
Blinkimg
Type 100 into Max file size. The file lands at or under it, in one pass.
Optimizilla
Move the slider, read the estimate, apply, check, for each image.
An iPhone HEIC photo
Blinkimg
Decoded and saved as JPG, PNG, WebP or AVIF.
Optimizilla
Not accepted; the sister converter takes it.
A JPEG already compressed hard
Blinkimg
Returned as it is when a re-encode would be bigger, unless it carries metadata to strip.
Optimizilla
Returned byte-identical, its EXIF and GPS included.
A PNG photo with gradients
Blinkimg
A palette PNG on Auto; quality 100 keeps every colour.
Optimizilla
PNG8 by default; photo-like PNGs that fail its bar stay full colour.
A 4000-pixel photo for a website
Blinkimg
Set Max resolution and compress in the same run.
Optimizilla
No resize; its blog says to resize elsewhere first.
An animated GIF
Blinkimg
Not accepted.
Optimizilla
Compressed with its animation kept.
An SVG logo
Blinkimg
Not accepted. Export it as PNG first.
Optimizilla
Compressed with a precision control.
A 40 MB camera JPEG
Blinkimg
Over 30 MB on Free; Pro takes 90 MB a file.
Optimizilla
Accepted up to 50 MB, compressed on your device.
Privacy
Is it safe? How each side handles your photos
Since January 2026 the two tools make opposite choices. Optimizilla never sees your photos; Blinkimg uploads them and deletes them on a timer.
Blinkimg
Uploaded, then deleted within 24 hours
Each photo is processed on our servers and wiped within 24 hours. We keep nothing after that.
Metadata stripped from every file
Even a file we return at its size has its GPS and camera details removed while stripping is on.
No advertising cookies
Our analytics, Microsoft Clarity, sets no cookie, and the compressor is masked from it.
A named operator
The about and privacy pages say who runs Blinkimg and where the servers are.
Optimizilla
Nothing uploaded
Its terms say all processing is performed in your browser and no server-side processing is involved.
Unchanged files keep metadata
Its blog says a file returned byte-identical keeps the same EXIF, GPS included.
Ad and statistics cookies
Its terms name Google ad personalization cookies and statistics cookies, accepted by using the site.
No named operator
The terms name only the operator of imagecompressor.com, with no company, address or contact.
For photos that must never leave your device, Optimizilla is the better design, and so are Squoosh and compressjpeg.com, which shares its terms and its code.
For developers
When the compressing has to run in code
Optimizilla states no API, app or plugin. Blinkimg runs the same engine as the tool from a script or an AI agent.
Task
Blinkimg
Optimizilla
Developer API
Live, documented
None stated
Exact size
targetBytes, never over
Not offered
Convert
JPG, PNG, WebP, AVIF
A sister site
AI agents
MCP server: Claude, ChatGPT, Cursor
None
Free each month
500 credits
No API
Optimizilla's pages, read on 2 October 2026, state no API. Ours from the job options in our OpenAPI document.
The image API page has the endpoints and a curl example, and the MCP server page sets it up in a minute.
Switching
Switch from Optimizilla in one minute
No account and nothing to install. What took a batch of 20, a second site and twenty downloads takes one drop.
01
Drop the same files
Up to 50 at once, 30 MB each, with iPhone photos beside the JPGs and PNGs.
02
Pick a format or a size
Leave Auto on, pick WebP or AVIF, or type a Max file size like 100 KB for the whole batch.
03
Download and compare
Each row shows its real size and a before and after slider. Take one file, or all of them as a ZIP.
Compare
More comparisons
The same side-by-side treatment for the other tools people leave for Blinkimg.
Optimizilla's facts come from its own pages and the settings its page serves; ours are the limits the tool enforces and the files the engine produced.
Q:What is the best Optimizilla alternative?
For more than 20 images, a file under an exact size, iPhone HEIC photos or WebP and AVIF output, Blinkimg: 50 images a batch, back as one ZIP, free with no signup. For SVG, GIF or a slider on every image with nothing uploaded, Optimizilla is still a good choice.
Q:Is Optimizilla still available?
Yes, under another name. optimizilla.com has redirected to imagecompressor.com since at least 2022, and the live site calls itself Image Compressor. On 2 October 2026 optimizilla.com itself did not answer, so go straight to imagecompressor.com, where its tool, terms and blog now live, free and with no account.
Q:Does Optimizilla upload my photos?
Not any more. Since the first week of January 2026 it compresses in your browser; its terms say no server-side processing is involved. Before that it uploaded files and deleted them after an hour, which is what most pages about it still describe. Blinkimg uploads files and deletes them within 24 hours.
Q:How many images can Optimizilla compress at once?
20. Its page sets a limit of 20 files, and anything past the twentieth is skipped without a message; the home page never states the number. There is no daily limit. Blinkimg takes 50 images a batch on the free tool, 30 MB each.
Q:Can Optimizilla compress an image to a specific size, like 100 KB?
No. It has a quality slider and a size estimate, but no target; its own blog says better tools handle the guess-and-check loop for you. Blinkimg takes a target in KB or MB: our 576.8 KB test JPEG came back at 99.7 KB under 100 KB, in one pass.
Q:Can Optimizilla convert to WebP or AVIF, or open HEIC?
Not in the compressor: files come back in their own format, and HEIC is not accepted. For conversion it links a sister site, imageconverter.com, which takes HEIC. Blinkimg compresses and converts in one drop, HEIC in and JPG, PNG, WebP or AVIF out.
Q:Why do my PNGs look banded after Optimizilla?
Its home page says PNGs are converted to PNG8, a palette of up to 256 colours, and warns that photos and smooth gradients may not suit it. Its blog adds that photo-like PNGs failing its quality bar stay full colour. Blinkimg also writes a palette PNG on Auto, and keeps every colour at quality 100.
Q:Does Optimizilla remove EXIF and GPS data?
From the files it re-encodes, yes. But its own blog says about 30% of JPEGs come back byte-identical, with the same EXIF, when they are already at or below the target quality. Blinkimg never hands back a file with metadata while stripping is on, even when that file is a few bytes bigger.
Q:Can I download all my images as a ZIP from Optimizilla?
Not on the current site. SAVE ALL saves each file one after another; the old site offered a ZIP until January 2026. Blinkimg returns each file on its own or the whole batch as one ZIP, which a browser handles as one download instead of twenty.
Q:Can Optimizilla resize images?
No. The compressor has no resize or maximum-size control, though its own blog says resizing first is almost always the better step. Blinkimg sets a maximum width and height in the same run, never enlarges, and the editor crops, straightens and adjusts before you save.
Q:Which makes smaller files, Optimizilla or Blinkimg?
On JPEG, Blinkimg: at the same quality 80 our file of our reference photo was 13% smaller, at 37.6 dB PSNR against its 37.8 dB. On a PNG photo, Optimizilla: its palette file measured 889.8 KB against our 994.3 KB, with ours keeping slightly more detail.
Q:Is Optimizilla free?
Yes. It needs no registration, sets no daily limit, adds no watermark, and its terms allow personal or commercial use. The same terms say Google uses cookies on the site for ad personalization and measurement. Blinkimg’s tool is free too, with no account and no advertising cookies.
Q:Which image optimizer is the best?
It depends on the job. For files under an exact size, iPhone photos or big batches, Blinkimg. For one image tuned by eye, Squoosh. For SVG and GIF, Optimizilla or Compressor.io. For WordPress, ShortPixel or TinyPNG. For offline folders, ImageOptim or Caesium.
Q:Why trust a Optimizilla comparison that Blinkimg wrote?
Because you can check each line. Every Optimizilla fact is quoted from imagecompressor.com, its terms, its how-to and its blog, read on 2 October 2026, and linked below. The measurements come from the live tool at its own settings. Where it wins, on PNG size, SVG and privacy, the page says so.
