TinyPNG Alternative as a Chrome Extension: Online Image Compressor vs a Photo Compressor That Runs in Your Browser

People go looking for a TinyPNG alternative for one of two reasons: they hit the 20-image ceiling on the free plan, or they notice their pictures are leaving their computer entirely. Photo Compressor is a Chrome extension image compressor built to answer both — an image compressor that runs inside the browser instead of a website you upload files to. According to TinyPNG’s own site, the free tier caps out fast, which is exactly the gap this comparison walks through.

TinyPNG, iLoveIMG, Squoosh and Compressor.io are all solid tools, and each one has a real reason to be chosen over the others. This page lays out where the extension wins, where it genuinely does not, and where each online image compressor still beats a Chrome extension outright. Install Photo Compressor from the Chrome Web Store if you want to follow along with the numbers below on your own files.

What people actually hit when they look for a TinyPNG alternative

Most searches for a TinyPNG alternative start with a wall, not a feature request. TinyPNG’s free web tool processes up to 20 images at a time, and each one has to be under 5 MB — fine for a handful of product photos, awkward the moment someone tries to batch-process a folder from a phone.

The free ceiling

Drop 60 photos from a recent phone backup onto TinyPNG and the tool stops at image 20. The remaining 40 need a second and third pass, or a paid Web Pro subscription, which runs close to $39 a year once discounts end. iLoveIMG has the same shape of limit from a different angle: its compress tool allows roughly 30 operations a month before Premium kicks in at $4–7 a month. Compressor.io caps free use at 10 MB per file and 50 compressions a day. None of these numbers are hidden — they are simply the kind of limit nobody notices until they need image number 21.

The upload question

The other trigger is more specific: does the image get uploaded to a server? With TinyPNG, yes. Files are sent to Tinify B.V.’s infrastructure, held temporarily, optimized, and — per the company’s own policy — deleted within 48 hours, while request logs (browser type, IP address, API key, timestamp, and a fingerprint of the transferred file) are retained for up to 31 days. That is not a security flaw; it is simply a different model. TinyPNG promises to delete your file. A Chrome extension that compresses locally never receives it in the first place, so there is nothing to delete.

Where TinyPNG, iLoveIMG, Squoosh and Compressor.io are genuinely better

None of these four tools is a lesser product just because a browser extension exists. Each one wins outright in at least one dimension.

TinyPNG: the PNG algorithm

TinyPNG built its reputation on a proprietary smart-compression algorithm that uses palette quantization for PNG files. On flat graphics, screenshots and images with transparency, that algorithm objectively beats ordinary canvas-based recompression — the same file comes out smaller at comparable visual quality. TinyPNG also ships a Developer API with 500 free compressions a month and an official WordPress plugin, a whole segment of automated, server-side use that a browser extension does not reach at all.

iLoveIMG: it is a whole toolbox

iLoveIMG is not a single-purpose tool. It sits inside the iLovePDF/iLoveIMG/iLoveAPI family and bundles resize, crop, format conversion, background removal, upscaling, watermarking, face blurring and a meme editor alongside compression, plus direct import from Google Drive and Dropbox. A Chrome extension that does one job well is, by definition, not a toolbox.

Squoosh: manual control and modern codecs

Squoosh gives you the deepest manual control in this category. It runs MozJPEG, OxiPNG, WebP, AVIF and JPEG XL through WebAssembly, with a slider for every parameter and a side-by-side before/after view. For someone who wants to hand-tune one image to the byte, nothing here beats it. And it is worth saying plainly: Squoosh also compresses entirely locally in the browser — “all image compression happens locally in your browser,” per its own project page — so privacy is not an argument unique to extensions. It just does not batch: one image at a time, no ZIP export.

All four: nothing to install

Open a tab and the job is done. That is a real advantage over any extension, which asks for an install and a permissions prompt before the first file is touched. For a single one-off image, a website is simply faster to reach.

Where the extension wins

A handful of things exist only in the extension, not in any of the four sites above.

Compress to an exact size in kilobytes. This is the extension’s sharpest edge. TinyPNG, iLoveIMG, Squoosh and Compressor.io all give you a quality slider and leave the resulting file size to chance — hitting a hard ceiling means dragging the slider, checking the output, and trying again. Photo Compressor takes a target in kilobytes and lands on it directly, which matters most when a government form, job application or listing site enforces a strict upload limit.

A side panel instead of a popup. Every one of the tools above works in a tab or a popup that closes the moment you click away. Photo Compressor’s side panel stays open in Chrome while you switch tabs and collect images, which is a small thing until you are gathering files from six different pages at once.

Right-click any image on a page. The “Compress Image” entry in the right-click context menu compresses an image directly off a web page — no separate download-then-upload step first.

Batch out as one ZIP, with your own filename. There is no cap on how many files go into a batch, the whole set downloads as a single ZIP, and the output keeps a filename you choose. Compressor.io, by contrast, only unlocks custom renaming on its $50-a-year Pro tier.

Nothing leaves the machine, and there is no quota. Against the three server-based tools here, that matters for real reasons — lawyers, healthcare staff and HR teams who cannot upload client documents to a third party at all. But it should be said honestly: Squoosh does the same, and so does the web tool CompressImage.io, which processes images locally with no size or count limit whatsoever.

The comparison table

Where we lose, honestly

Three limits are worth stating plainly rather than glossing over.

Audience and reviews

Photo Compressor has 358 users and three reviews. TinyPNG and iLoveIMG serve millions of requests with thousands of reviews behind them, and Squoosh carries 25,800 stars on GitHub. Choosing a tool by install count and star rating is a rational move, and by that measure the extension is nowhere near the top of this list yet.

No API, no WordPress plugin

Anyone automating compression inside a build pipeline or a CMS needs TinyPNG’s Developer API or its WordPress plugin — the extension has no equivalent and is not trying to be one.

PNG graphics

TinyPNG’s palette-quantization algorithm is purpose-built for PNG. On flat-color graphics and transparent images, that specialization wins on size-to-quality ratio over an extension doing ordinary browser-based recompression. The extension’s 50-70 percent reduction figures are strongest on photographs, not on illustrations or screenshots.

The Squoosh project, built by Google Chrome Labs, states its own local-processing model plainly in its public repository:

All image compression happens locally in your browser.

Squoosh, Google Chrome Labs

Which one to pick

A quick way to decide, based on what the job actually is:

1. One-off image, done in ten seconds — any of the four websites above works fine; installing anything is overkill.
2. Flat-color PNG or a screenshot that needs to be as small as possible — TinyPNG’s palette quantization will beat a generic recompressor.
3. One image, fine manual control over every codec parameter — Squoosh.
4. Compression plus resize, crop, background removal or format conversion in one place — iLoveIMG.
5. A folder of files, a hard KB limit to hit, or documents that cannot leave the machine — the extension.
6. Regular batches, several times a week, without a subscription — the extension, since there is no quota to run into.
7. Automated compression inside a website build or CMS — TinyPNG’s Developer API, which the extension does not offer.

Install Photo Compressor from the Chrome Web Store if the last three scenarios match what you actually do — it is free either way. Photo Compressor’s own feature list and pricing page cover the rest of what it does beyond this comparison, and the how-to-use guide walks through the side panel and the right-click menu step by step.

Official sources

• TinyPNG — free-tier limits, PNG algorithm, and data-retention policy
• iLoveIMG — toolbox scope and Premium pricing
• Squoosh — local-processing codecs and manual controls
• Compressor.io — free-tier limits and Pro renaming feature
• Photo Compressor on the Chrome Web Store — install page, ratings and permissions
• Chrome side panel documentation — how the Chrome side panel API works under the hood

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