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Test scope & comparison notes
These are recorded facts, not a unified ranking. Tested tiers and scope are not consistently recorded. Read pricing with its date and timing with its conditions. Privacy observations reflect visible flows and statements, not a security audit.
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 | Squoosh | Aiseesoft | Switch / compare |
|---|---|---|---|
| Background removal | Not tested in topic | 84/100 2048 × 2048 · PNG | Compare in task topic → |
| Image compression | 97/100 JPEG · Output attached | 87/100 2048 × 2048 · PNG | Active task |
| Image upscaling | Not tested in topic | 83/100 1024 × 1024 · PNG | Compare in task topic → |
| Object removal | Not tested in topic | 72/100 2048 × 2048 · PNG | Compare in task topic → |
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Browse this task →| Criterion | Squoosh (Google Chrome Labs) Image compression 97/100 Seven-aspect task score Free, open-source, login-free and ad-free on-device processing suits privacy and fine control; results depend on the chosen codec and settings. Tested export JPEG · Output attached Historical test · 2026-10-18 | Aiseesoft Free Image Compressor Online Image compression 87/100 Seven-aspect task score No-login 2048×2048 watermark-free PNG export for files under 5 MB with 40-image batching and a 78.39% size reduction, though processing takes 11.68s. Tested export 2048 × 2048 · PNG Historical test · 2026-10-23 |
|---|---|---|
| Pricing & rules | ||
| Pricing plans | Squoosh in-browser local image compressor; open-source free · 2026-10-21 Plan · source date Monthly / one-time Annual bill / period Quota & limits Squoosh Web (Open-source free)2026-10-21 ↗ Free Free Free Completely free without login; local browser processing with no usage-count or file-size hard caps and full-resolution unwatermarked export. 1 plan / billing-period records, all listed; — means that period is not recorded. The official page states that all work runs locally in the browser so images never leave the device; it is an Apache-2.0 open-source tool with no paid tiers or in-app purchases. Cancellation, sources & verification recordCompletely free open-source tool with no accounts or subscription charges. Squoosh official page and open-source notice ↗ · 2026-10-21 Capture 1 ↗ | This web background remover; excludes desktop software and stock subscriptions · 2026-10-20 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free web tool2026-10-20 ↗ Free Free Free Officially described as fully free; no paid tier listed No published count or maximum output size; this does not establish unlimited HD 1 plan / billing-period records, all listed; — means that period is not recorded. No published count or maximum output size; this does not establish unlimited HD Cancellation, sources & verification recordCancellation and refund terms follow official checkout and help policies. Official plans and usage terms ↗ · 2026-10-20 Capture 1 ↗ |
| Free & trial allowance on the test date | Unlimited free forever with no daily count or file size caps | Free batch compression up to 40 images at a time, max 5 MB per image |
| Cancellation & refunds | Completely free open-source tool with no accounts or subscription charges. | Cancellation and refund terms follow official checkout and help policies. |
| Disclosure of costs & limits | Original size, compressed size, and reduction percentage are displayed in real time on drop | Clearly discloses "Up to 40 images, max 5MB each" inside the upload box before upload |
| Task quality | ||
| Measured fixture results | File reduction: 93.26% · Output size: 278.8 KB | File reduction: 78.39% · Output size: 894.2 KB |
| Fixture findings | Local processing reduced this fixture by about 93%; results depend on the codec and settings. | Shrinks the 4.14 MB standard PNG by 78.39% to 894.2 KB in native PNG format at 31.12 dB PSNR and 0.9896 SSIM. |
| Original historical observation | Squoosh is the gold standard of honest online utilities: uploading 0 bytes to any server, its local WebAssembly engine compresses our 4.24 MB 2048×2048 anchor image down to 278.8 KB (-93.26%) in 0.85s while maintaining PSNR=37.13 dB and SSIM=0.9973 (02_workspace.png). | Aiseesoft Free Image Compressor shrinks the 4.24 MB (2048×2048) anchor PNG down to 894.2 KB (-78.39%, 4.63× ratio) without login, preserving native PNG dimensions at PSNR=31.12 dB and SSIM=0.9896. |
| Suitable uses · historical assessment | Privacy-conscious users, developers, and designers who refuse to upload sensitive photos to cloud servers and want fine-grained codec control with real-time split-screen preview | Users looking for high-ratio (-78%) no-login PNG compression on files under 5 MB without creating an account |
| Result & output evidence | ||
| Delivery capabilities | ||
| Recorded export specifications | JPEG · Output attached · No watermark in test | 2048 × 2048 · PNG · No watermark in test |
| Historical specification note · not an official maximum | 2048×2048 (unlimited dimensions, local WebAssembly zero-watermark export) | 2048×2048 (native PNG format preserved, no-login watermark-free export) |
| Watermark observation | Watermark-free | Watermark-free |
| Batch & API | Focused on single-image interactive codec tuning | Supports up to 40 images in batch with one-click Download All |
| Recorded free-tier dimensions | 2048 × 2048 | 2048 × 2048 |
| Attached file dimensions | Not verified | 2048 × 2048 · PNG |
| Speed & reliability | ||
| Timing observation | Recorded local processing time: 0.85s · End-to-end reference: 0.85s | Network-observed server wait: 11.68s · End-to-end reference: 11.68s |
| Date & fixture | 2026-10-18 · anchor_compress_v1 · US-West (California, AS2914) | 2026-10-23 · 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 | 100% No Login Required (no account system, pure client-side browser utility) | Completely guest-accessible; no login or registration required |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Zero sign-up, zero popups, and zero ad trackers—opens directly into a millisecond-responsive split-screen comparison workspace. | Zero registration walls or popups; displays a clean inline progress bar ("4.04 MB → 894.19 KB -78%") with direct Download and Download All buttons, alongside a single text link for its desktop video app. |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | Google Chrome Labs | Aiseesoft Studio |
| Recorded origin | Mountain View, California, USA | Hong Kong / Shenzhen, China |
| Domain history record | 2018–Present (maintained by Google Chrome DevRel) | 2008–Present |
| Background & reputation assessment | Created and open-sourced by the Google Chrome Web DevRel team as the reference WebAssembly image codec playground. | Operated by Aiseesoft Studio (established multimedia and document utility vendor since 2008). |
| External reputation record | Not verified | Not verified |
| Engineering & privacy | ||
| Processing location | On-device processing | Uploaded for cloud processing |
| Third-party tracking record | Not verified | No third-party services listed in this record; this is not proof that none exist. |
| Engineering & privacy assessment | CDP network capture confirms 100% client-side WebAssembly execution (MozJPEG / OxiPNG / WebP / AVIF) with 0 bytes uploaded to any remote server; works offline as a PWA. | Direct HTTPS multipart POST to image-api.aiseesoft.com/imageCompress with CDN delivery via istorage-cloud.com; no account required. |
| Retention statement | This flow runs locally; post-close deletion not independently verified | Explicit retention period unconfirmed; inspect policy record |
| Evaluation basis | ||
| Pricing transparency | 35 / 35 100% open-source and free with zero paywalls, zero in-app purchases, zero resolution caps, and zero ads. Dragging in the 4.24 MB (2048×2048) anchor image immediately enables real-time split-slider comparison and one-click export (01_landing.png, 02_workspace.png, 03_download.png). | 31 / 35 Landing page explicitly states "100% Free — Up to 40 images, max 5MB each" right inside the upload dropzone (01_landing.png); the 4.04 MB anchor PNG is compressed and downloaded without login or paywall prompts (02_result.png, 03_download.png). |
| Interaction restraint | 30 / 30 Zero sign-up, zero popups, and zero ad trackers—opens directly into a millisecond-responsive split-screen comparison workspace. | 26 / 30 Zero registration walls or popups; displays a clean inline progress bar ("4.04 MB → 894.19 KB -78%") with direct Download and Download All buttons, alongside a single text link for its desktop video app. |
| Background & reputation | 19.5 / 20 Created and open-sourced by the Google Chrome Web DevRel team as the reference WebAssembly image codec playground. | 16.5 / 20 Operated by Aiseesoft Studio (established multimedia and document utility vendor since 2008). |
| Engineering & privacy | 14.5 / 15 CDP network capture confirms 100% client-side WebAssembly execution (MozJPEG / OxiPNG / WebP / AVIF) with 0 bytes uploaded to any remote server; works offline as a PWA. | 12.5 / 15 Direct HTTPS multipart POST to image-api.aiseesoft.com/imageCompress with CDN delivery via istorage-cloud.com; no account required. |
| Task quality | 61.6 / 65 Reduces file size by 93.26% (4,137.9 KB → 278.8 KB, 14.84× compression ratio) while preserving PSNR = 37.13 dB and SSIM = 0.9973, with full control over OxiPNG, MozJPEG, WebP, and AVIF encoders (61.6/65) | 57.5 / 65 Aggressively compresses the 4,237,170-byte (4,137.9 KB) 2048×2048 PNG down to 915,651 bytes (894.2 KB, -78.39%, 4.63× ratio) while keeping native 2048×2048 PNG format, achieving PSNR = 31.12 dB and SSIM = 0.9896 (57.5/65) |
| Deliverable specifications | 20 / 20 Preserves exact 2048×2048 dimensions (unless Resize is toggled by the user) with unrestricted local PNG/JPEG/WebP/AVIF download (20.0/20) | 19 / 20 Exports a full 2048×2048 watermark-free PNG without login, though single files are capped at 5 MB (19.0/20) |
| Processing speed | 14 / 15 100% local multi-threaded WebAssembly encoding with 0.0s network upload latency; re-encodes the 2048×2048 anchor in ~0.85s (14.0/15) | 10.5 / 15 Single-sample XHR timing (image-api.aiseesoft.com/imageCompress): 11.68s combined upload and server compression (10.5/15) |
