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Free TinyPNG Alternative — compress images to an exact KB target

TinyPNG compresses an image as far as it can. Ad servers don't care how far — they care about the number: 150 KB initial load, 40 KB backup JPG. Our free Ad Image Compressor works backwards from your KB limit, keeps the original format and pixel dimensions, and does it all in your browser — your files never upload anywhere.

Compress to a KB target free Browse all Studio-Tools
An honest comparison — including where TinyPNG is still the better buy. Prices verified 2 September 2026.
At a glance

TinyPNG vs Image Optimizer

TinyPNG (Web Pro / Ultra)DigiLakshya Image Optimizer
Entry priceFree plan (20 compressions, 5 MB per image) · Web Pro $39/yr, Web Ultra $149/yr — yearly billing only, no monthly plan (verified 21 September 2026) — ShortPixel ~$9.99/mo, iLoveIMG ~$9/mo play in the same bracket$0 — compressing and previewing are free with no signup; a free account downloads every file at full size. Download all is PRO ($35/mo · $280/yr, the whole suite)
Core jobSmart lossy compression — the file gets as small as it gets, plus WebP/AVIF conversionCompression to an exact KB target you set on a slider — built for ad weight limits — keeping original format and dimensions, single files or whole banner ZIPs
Where your files goUploaded to TinyPNG's serversCompressed locally in your browser — files never leave your machine
Signup requiredAccount for paid plansNo — open it and drop files in

Prices verified 2 September 2026 from each vendor's pricing page (TinyPNG, ShortPixel, iLoveIMG) — entry-tier list prices (TinyPNG bills yearly only). Our $0 is the everyday free tier; Pro pricing is on the Studio-Tools pricing page.

What the compressor does

Hit the weight limit without wrecking the creative

Any KB target

Drag the slider to your limit — 150 KB, 40 KB, anything — and every image is squeezed to at or under it. It opens at roughly 32% smaller by default, and warns in red before any image would have to be resized.

Keeps format & dimensions

JPG stays JPG, PNG stays PNG, WebP stays WebP, and GIF keeps its animation — at the original pixel size. No surprise format swaps that break an ad server's asset checks.

Whole banner ZIPs

Drop a packaged banner .zip and it optimises every image inside. Check before/after sizes and percent saved, then download files individually or as one ZIP.

Private & quality-aware

Everything runs locally in your browser — nothing is uploaded. And it never ships a file bigger than the one you gave it: if it can't beat your original, you keep the original.

The honest part

Where TinyPNG is still the better choice

APIs, plugins and pipelines. TinyPNG's developer API, CMS plugins and Photoshop integration compress images automatically inside your build or publishing flow. Ours is a hands-on browser tool — there's no API to call.
Next-gen format conversion. TinyPNG converts to WebP and AVIF as part of compression. Our compressor deliberately keeps your original format, and our separate image converter covers JPG/PNG/WebP/GIF — no AVIF.
Warehouse-scale batches. Server-side services chew through thousands of files without breaking a sweat. In-browser compression is bound by your machine's memory — great for campaign-sized batches, wrong for bulk archives.

If you're automating compression in a pipeline, pay for TinyPNG or ShortPixel — genuinely. If you're a designer or ad-ops person getting creatives under a weight limit, start free below.

How it works

Under your limit in three steps

1

Add images or a ZIP

Drag PNG, JPG, GIF or WebP files — or a whole banner .zip — into the Ad Image Compressor. Nothing uploads to a server.

2

Set the KB target

Drag the slider to your weight limit or type it. The tool ramps quality down only as far as needed and warns in red, by file name, before any image would have to be resized.

3

Download optimised files

Check before/after sizes, then download one at a time at full size with a free account, or as one ZIP with PRO.

FAQ

Quick answers.

Is the ad image compressor really free?
Yes — no signup, no install, and you can compress as much as you like in the browser. The disclosed limit: compressing and previewing are free with no signup at all; downloading needs a free account, and every file comes down at full size with no daily limit. Download all as one ZIP is a PRO feature, and we would rather say so here than let you find it at the download button. Samples download with no account. Pro at $35/mo or $280/yr covers the whole Studio-Tools suite's extras — see tools pricing for exactly what's free vs paid.
Do my images get uploaded to a server?
No. All compression happens locally in your browser and your files never leave your machine — safe for unreleased campaigns and confidential creative. TinyPNG, ShortPixel and iLoveIMG work the other way: your images upload to their servers for processing. Details on how we handle files.
How is exact-KB targeting different from what TinyPNG does?
TinyPNG's smart lossy compression shrinks a file as far as it sensibly can — and the result is whatever it is. Ad platforms don't grade on effort: CM360 wants backup JPGs at 40 KB, display specs commonly budget 150 KB initial load. Our compressor works backwards from the number — drag the slider to your KB limit and every file comes out at or under it, keeping its original format and pixel dimensions, with a red warning before any image would have to be resized to make target.
What formats does it output?
The same one you gave it — that's the point. JPG stays JPG and WebP stays WebP (quality search), PNG stays PNG (colour-depth reduction), and GIF stays GIF with its animation intact (palette re-encode). It shows before/after sizes and percent saved, and it never ships a file bigger than the one you dropped in — if it can't beat your original, you keep the original.
When is TinyPNG still the better choice?
Honestly: automation. TinyPNG's API and paid Web plans slot into developer pipelines, CMS plugins and Photoshop — and it converts to WebP and AVIF (unlimited conversions on Web Ultra). Ours is a hands-on browser tool for ad production: no API, no AVIF, and very large batches are bound by your browser's memory. If you compress by the thousand on a server, pay TinyPNG; if you need this banner under 150 KB now, ours is free.
Do these tools use credits or tokens?
No — never. Use and preview every tool with no account. A free account downloads any single result at full size, with no daily limit. PRO adds Download all, every banner size, more share links and saving to your account. A few things keep a small free allowance: QA checks (2 a day with no account, 5 with a free one) and hosted share links (5 a month, 1 a day, live 3 days). PRO is a flat $35/month ($280/year) for unlimited use of all 35+ tools: no credit packs, no top-ups, no per-use fees. Many comparable tools bill per credit (remove.bg, CloudConvert, AdCreative.ai) — here one flat subscription covers everything. See tools pricing.

Name the KB. Keep the format. Skip the upload.

Built by an ad-production studio that lives under 150 KB and 40 KB limits every day — free, in your browser, no signup.

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