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Test scope & comparison notes
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Cross-task capability coverage across selected products
Each product is scored independently per task edge; switch tasks below while keeping shared products selected| Task edge | ezgif.com | Optimizilla | Switch / compare |
|---|---|---|---|
| Image compression | 91/100 2048 × 2048 · PNG | 88/100 2048 × 2048 · PNG | Active task |
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Browse this task →| Criterion | Ezgif Image compression 91/100 Seven-aspect task score A classic 14-year-old no-login free utility supporting on-device WebAssembly lossless compression; ideal for users wanting 100% fidelity without sign-up. Tested export 2048 × 2048 · PNG Historical test · 2026-10-31 | Optimizilla (ImageCompressor.com) Image compression 88/100 Seven-aspect task score Free login-free on-device processing offers color controls and about 58% PNG reduction; download-like and fullscreen ads create misclick risk. Tested export 2048 × 2048 · PNG Historical test · 2026-10-18 |
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| Pricing & rules | ||
| Pricing plans | Ezgif 100% free web utility structure · 2026-10-30 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free2026-10-30 ↗ Free Free Free 100% free without login, up to 100MB file limit, unlimited daily uses Animated GIF/WebP/AVIF maker, optimizer/compressor, video converter 1 plan / billing-period records, all listed; — means that period is not recorded. All features are 100% free without sign-up or credit card, supporting files up to 100MB with unlimited conversions. Cancellation, sources & verification recordCancellation and refund terms unverified Ezgif About & Engine Information ↗ · 2026-10-30 Capture 1 ↗ | ImageCompressor.com in-browser online image compressor · 2026-10-21 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free Browser Compressor2026-10-21 ↗ Free Free Free Free without login; local browser processing for JPEG/PNG/WebP/GIF/SVG with batch compression and per-image quality tuning. 1 plan / billing-period records, all listed; — means that period is not recorded. The official page states that this free online tool runs entirely in the browser with no server uploads required, supporting batch JPEG, PNG, WebP, GIF, and SVG compression with per-image quality tuning, supported by display ads. Cancellation, sources & verification recordAd-supported free tool with no accounts or subscription charges. ImageCompressor.com official page and instructions ↗ · 2026-10-21 Capture 1 ↗ |
| Free & trial allowance on the test date | Unlimited free usage, max 100MB per file | Supports multi-file batch drag-and-drop and per-image palette color tuning (2–256 colors) with no daily cap |
| Cancellation & refunds | Not verified | Ad-supported free tool with no accounts or subscription charges. |
| Disclosure of costs & limits | Tool limits and lossless optimization options clearly shown on upload header | All features and sliders are unlocked upfront with zero hidden paywalls |
| Task quality | ||
| Measured fixture results | File reduction: 13.95% · Output size: 3560.8 KB | File reduction: 57.64% · Output size: 1752.7 KB |
| Fixture findings | On-device WASM lossless optimization reduced file size by ~14% with flawless PSNR and SSIM fidelity; requires a few seconds of local computation. | Offers before/after preview and colour adjustment; distinguish nearby ad buttons from the real download. |
| Original historical observation | Ezgif provides a genuine lossless PNG compressor powered by OxiPNG: retaining full 2048×2048 dimensions and RGBA transparency, it cuts our 4.24 MB test asset by 13.95% (3,560.8 KB) at absolute fidelity with PSNR = 99.99 dB and SSIM = 1.0 (02_workspace.png, 03_download.png). | Optimizilla (imagecompressor.com) shines with its interactive Before/After comparison canvas and 'Colors: 224' fine-tuning slider, shrinking our 4.14 MB anchor by 57.64% to 1.75 MB at PSNR=38.98 dB; however, users must watch out for two green 'DOWNLOAD EXTENSION' fake download ad banners directly above and below the workspace (01_landing.png, 02_workspace.png). |
| Suitable uses · historical assessment | Users and developers who require mathematical pixel fidelity (PSNR = 99.99 dB, SSIM = 1.0) while slimming down oversized PNG assets quickly without registration | Users who want to manually fine-tune PNG palette color counts (2–256 colors) with a live Before/After preview—provided they avoid the fake 'DOWNLOAD EXTENSION' ad banners |
| Result & output evidence | ||
| Delivery capabilities | ||
| Recorded export specifications | 2048 × 2048 · PNG · No watermark in test | 2048 × 2048 · PNG · No watermark in test |
| Historical specification note · not an official maximum | 2048×2048 (native resolution lossless PNG, zero watermarks) | 2048×2048 (no-login native-resolution watermark-free PNG direct export) |
| Watermark observation | Watermark-free | Watermark-free |
| Batch & API | Single or multiple file upload direct in web interface | Supports multi-image batch compression in browser; no developer API |
| Recorded free-tier dimensions | 2048 × 2048 | 2048 × 2048 |
| Attached file dimensions | 2048 × 2048 · PNG | 2048 × 2048 · PNG |
| Speed & reliability | ||
| Timing observation | Recorded local processing time: 4s · End-to-end reference: 4s | Recorded local processing time: 11.88s · End-to-end reference: 11.88s |
| Date & fixture | 2026-10-31 · anchor_compress_v1 · US-West (California, AS2914) | 2026-10-18 · anchor_compress_v1 · US-West (California, AS2914) |
| Repeated tests & reliability | No standardized repetition count, success rate or variability range is recorded. | No standardized repetition count, success rate or variability range is recorded. |
| Interaction experience | ||
| Account requirements | No login in this test | No login in this test |
| Sign-in methods | No login required (anonymous utility) | No login required (no account system on the site) |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Zero mandatory registration, no gating popups, and no artificial countdowns. While display ads are present, they do not disrupt compression and export. | While there are no sign-up walls, the workspace is flanked top and bottom by deceptive green 'DOWNLOAD EXTENSION / Click "Download" -> Add Trusted Spot Extension' ad banners, and a full-screen Google AdSense overlay (#aswift_3) intercepted the initial COMPRESS click (01_landing.png, 02_workspace.png). |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | Ezgif.com | Optimizilla / ImageCompressor.com |
| Recorded origin | Latvia | Independent European Web Utility (Launched 2014) |
| Domain history record | 2012–Present (14 years online) | 2014–Present (12-year image compression benchmark) |
| Background & reputation assessment | Continuously operated since 2012 by independent creators, widely respected for robust integration with standard open-source CLI engines (OxiPNG, ImageMagick, gifsicle). | Operating since 2014 under the Optimizilla brand, ranking among the highest-traffic search destinations for online image compression. |
| External reputation record | Not verified | Not verified |
| Engineering & privacy | ||
| Processing location | On-device processing | On-device processing |
| Third-party tracking record | Google AdSense · Google Analytics | Not verified |
| Engineering & privacy assessment | CDP network inspection confirms PNG compression executes locally via WebAssembly (squoosh_oxipng_bg.wasm). Server-side processing runs on temporary caches auto-purged within 1-2 hours. | Modernized architecture runs 100% local in-browser WebAssembly palette quantization ('All processing happens in your browser'), so user photos are never uploaded to a remote server. |
| Retention statement | This flow runs locally; post-close deletion not independently verified | This flow runs locally; post-close deletion not independently verified |
| Evaluation basis | ||
| Pricing transparency | 35 / 35 100% completely free with no subscriptions, paywalls, or resolution reductions. Uploading our 4.24 MB (2048×2048) anchor PNG immediately yields a lossless compressed download (01_landing.png, 02_workspace.png, 03_download.png). | 32 / 35 100% free across the entire site with zero paywalls or subscription prompts; uploading the 4.14 MB (2048×2048) anchor image and clicking COMPRESS immediately unlocks the SAVE ALL export button without login (01_landing.png, 02_workspace.png, 03_download.png). |
| Interaction restraint | 28 / 30 Zero mandatory registration, no gating popups, and no artificial countdowns. While display ads are present, they do not disrupt compression and export. | 20 / 30 While there are no sign-up walls, the workspace is flanked top and bottom by deceptive green 'DOWNLOAD EXTENSION / Click "Download" -> Add Trusted Spot Extension' ad banners, and a full-screen Google AdSense overlay (#aswift_3) intercepted the initial COMPRESS click (01_landing.png, 02_workspace.png). |
| Background & reputation | 18 / 20 Continuously operated since 2012 by independent creators, widely respected for robust integration with standard open-source CLI engines (OxiPNG, ImageMagick, gifsicle). | 18 / 20 Operating since 2014 under the Optimizilla brand, ranking among the highest-traffic search destinations for online image compression. |
| Engineering & privacy | 14 / 15 CDP network inspection confirms PNG compression executes locally via WebAssembly (squoosh_oxipng_bg.wasm). Server-side processing runs on temporary caches auto-purged within 1-2 hours. | 14.5 / 15 Modernized architecture runs 100% local in-browser WebAssembly palette quantization ('All processing happens in your browser'), so user photos are never uploaded to a remote server. |
| Task quality | 57 / 65 Lossless OxiPNG compression reduces 4,137.9 KB to 3,560.8 KB (-13.95%, 1.16× ratio) while preserving flawless 100% pixel fidelity (PSNR = 99.99 dB, SSIM = 1.0) (57.0/65) | 59.5 / 65 Default 224-color PNG palette quantization shrinks the 4,137.9 KB anchor down to 1,752.7 KB (-57.64%, 2.36× ratio) at PSNR = 38.98 dB and SSIM = 0.9983, with an interactive 2–256 Colors slider and live Before/After canvas preview (59.5/65) |
| Deliverable specifications | 20 / 20 Preserves native 2048×2048 dimensions and full alpha transparency with zero watermarks (20.0/20) | 20 / 20 Preserves 100% of the 2048×2048 pixel dimensions and native PNG format without watermarks or login requirements (20.0/20) |
| Processing speed | 12 / 15 Client-side WebAssembly (OxiPNG) execution takes ~4.0s with zero network upload latency (12.0/15) | 10.5 / 15 Local browser 224-color palette quantization on the 2048×2048 PNG takes ~11.88s and requires clicking COMPRESS followed by SAVE ALL (10.5/15) |
