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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 | Nero AI | Compressor.io | Switch / compare |
|---|---|---|---|
| Background removal | 80/100 2000 × 2000 · PNG | Not tested in topic | Compare in task topic → |
| Image compression | 88/100 2048 × 2048 · PNG | 86/100 2048 × 2048 · PNG | Active task |
| Image upscaling | 84/100 2048 × 2048 · PNG | Not tested in topic | Compare in task topic → |
| Object removal | 77/100 2000 × 2000 · PNG | Not tested in topic | Compare in task topic → |
| Image generation | 91/100 1024 × 1024 · PNG | Not tested in topic | Compare in task topic → |
| Photo restoration | 79/100 JPEG · Output attached | Not tested in topic | Compare in task topic → |
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Browse this task →| Criterion | Nero AI Image Compressor Image compression 88/100 Seven-aspect task score Exports a full 2048×2048 watermark-free PNG for 1 free credit with three compression modes and high fidelity (38.19 dB PSNR), cutting file size by roughly half. Tested export 2048 × 2048 · PNG Historical test · 2026-10-23 | Compressor.io Image compression 86/100 Seven-aspect task score Free size and Pro feature limits are disclosed upfront; login-free export retains full-size PNG with good quality, alongside banner ads. Tested export 2048 × 2048 · PNG Historical test · 2026-10-18 |
|---|---|---|
| Pricing & rules | ||
| Pricing plans | Nero AI web plans (Free / Standard / Yearly promo / Business); USD · 2026-10-21 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free2026-10-21 ↗ Free Free Free 5 free guest runs without login; 10 one-time credits per registered account (max 1000×1000px upload, 5 images/batch; 2× costs 1 credit, 4× costs 2 credits). Standard Monthly (300 credits)2026-10-21 ↗ USD 21.95/month — Monthly 300 credits/month (promotional USD 21.95/month, regular USD 24.99/month); up to 4000×4000px upload, 30 images/batch, priority processing, and 8× upscaling. Standard Yearly (3,000 credits/yr)2026-10-21 ↗ — Annual price not verified Annual 3,000 credits/year; promotional banner displays USD 7.66/month equivalent. Public page displays only the 7.66 USD/month equivalent without showing the annual invoice total before login. Business2026-10-21 ↗ Contact sales Quoted Quoted Custom credits and pricing (up to 200 images/batch, highest priority, API processing, and dedicated server). 4 plan / billing-period records, all listed; — means that period is not recorded. The official pricing page and credit table state that guests get 5 free runs and registered Free accounts receive 10 one-time Nero Credits (Standard/Photo/Anime 2× costs 1 credit/image, 4× costs 2 credits/image, paid-only 8× costs 4 credits/image). Standard monthly is USD 21.95/month promotional (regular USD 24.99/month, 300 credits/month). The yearly promo banner displays only "7.66 USD per month" (3,000 credits/year) without printing the annual invoice total before login, so the annual total is marked unverified. Verification has gaps; unknown prices and quotas are not inferred. Cancellation, sources & verification recordCancel anytime by turning off auto-renewal in account settings (remaining credits expire at the end of the billing period); FAQ states refunds are not allowed once Nero Credits have been used. Nero AI official pricing, credit consumption table, and FAQ ↗ · 2026-10-21 Capture 1 ↗ | Compressor.io web plans (Free / Web Compressor Pro); USD · 2026-10-21 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free2026-10-21 ↗ Free Free Free Free without login; max 10 MB per file, up to 50 compressions/day (supports JPEG/PNG/SVG/GIF/WEBP lossy and lossless modes). Web Compressor Pro2026-10-21 ↗ — USD 50/year Annual USD 50/year (1 user); max 20 MB per file, unlimited compressions, custom compression quality, image resizing, auto-rename, and no ads. Annual subscription; cancel anytime in the Account dashboard 2 plan / billing-period records, all listed; — means that period is not recorded. The official pricing page currently offers Free (max 10 MB per file, up to 50 lossy/lossless compressions per day) and Web Compressor Pro annual subscription (USD 50/year, max 20 MB per file, unlimited compressions, custom quality, image resizing, auto-rename, and no ads). Cancellation, sources & verification recordCancel anytime in the Account dashboard; official FAQ states a 7-day full refund with no questions asked (credit card refunds take 3–5 working days). Compressor.io official pricing and features comparison page ↗ · 2026-10-21 Capture 1 ↗ |
| Free & trial allowance on the test date | Consumes 1 Nero Credit per image compression task (free accounts receive initial and daily check-in credits) | Free up to 10 MB per file with both Lossy and Lossless modes; Custom quality and image resizing require Pro |
| Cancellation & refunds | Cancel anytime by turning off auto-renewal in account settings (remaining credits expire at the end of the billing period); FAQ states refunds are not allowed once Nero Credits have been used. | Cancel anytime in the Account dashboard; official FAQ states a 7-day full refund with no questions asked (credit card refunds take 3–5 working days). |
| Disclosure of costs & limits | Discloses "1 Nero Credit will be used" on the Start button before processing | Discloses 'Max 10 MB' directly above the Select files button |
| Task quality | ||
| Measured fixture results | File reduction: 49.74% · Output size: 2079.8 KB | File reduction: 47.38% · Output size: 2177.3 KB |
| Fixture findings | Reduces the standard PNG by 49.74% in native PNG format at 38.19 dB PSNR and 0.9979 SSIM with virtually lossless detail. | Reduced this fixture by about 47% with gradients retained; the recorded free file limit was 10MB. |
| Original historical observation | Nero AI Image Compressor shrinks the 4,237,170-byte (2048×2048) anchor PNG to 2,129,766 bytes (-49.74%) in High mode while maintaining native PNG format and 38.19 dB PSNR / 0.9979 SSIM. | Compressor.io adopts a conservative high-fidelity strategy in default Lossy mode: compressing our 4,137.9 KB master to 2,177.3 KB (-47.38%, 02_workspace.png) while maintaining 38.39 dB PSNR and 0.9980 SSIM with smooth dark gradients and clear upfront 10 MB limit disclosure. |
| Suitable uses · historical assessment | Users already in the Nero AI ecosystem who want high-PSNR (38.19 dB) PNG compression up to 50 MB / 16 MP with adjustable High/Low/Custom levels | Web designers compressing images under 10 MB who want high visual fidelity (PSNR > 38 dB) and easy switching between Lossy and Lossless modes |
| 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 PNG format preserved, watermark-free export) | 2048×2048 full-resolution PNG free direct export (up to 10 MB per file) |
| Watermark observation | Watermark-free | Watermark-free |
| Batch & API | Supports multi-file batch upload and REST API | Supports multi-file drag-and-drop and one-click Download All |
| Recorded free-tier dimensions | 2048 × 2048 | 2048 × 2048 |
| Attached file dimensions | 2048 × 2048 · PNG | 2048 × 2048 · PNG |
| Speed & reliability | ||
| Timing observation | Network-observed server wait: 6.56s · End-to-end reference: 15.36s | Network-observed server wait: 8.4s · End-to-end reference: 10.5s |
| Date & fixture | 2026-10-23 · 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 | Supports guest trial quota and Google / Email account login with daily free Nero Credits | No login required (email login for Pro subscribers) |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Provides a clean before/after zoom workspace showing "4.0MB → 2.0MB (-50.0%)" and exports the native 2048×2048 watermark-free PNG directly upon clicking Download (03_download.png). | Displays Google AdSense banners above and below the workspace, but the orange 'Download' and 'Download All' buttons are clean and direct without registration popups (02_workspace.png, 03_download.png). |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | Nero AG | Compressor.io |
| Recorded origin | Karlsruhe, Germany | France / European Independent Tool Team |
| Domain history record | Founded 1995 (Nero Burning ROM / Nero AI Suite) | 2013–Present (13-year established image optimizer) |
| Background & reputation assessment | Developed by Nero AG (Karlsruhe, Germany; founded in 1995), a long-established multimedia software company operating the Nero AI web and mobile suite. | Well-known online image optimization service operating since 2013 with strong adoption among web designers and developers. |
| External reputation record | Not verified | Not verified |
| Engineering & privacy | ||
| Processing location | Uploaded for cloud processing | Uploaded for cloud processing |
| Third-party tracking record | No third-party services listed in this record; this is not proof that none exist. | Not verified |
| Engineering & privacy assessment | HTTPS upload to ai.nero.com/api/v2/file/upload followed by asynchronous task polling (/api/v2/task/status, 6.56s server wait) and native PNG Blob export. | Supports anonymous no-login compression; temporary download links are cleaned up automatically after the session. |
| Retention statement | Explicit retention period unconfirmed; inspect policy record | Explicit retention period unconfirmed; inspect policy record |
| Evaluation basis | ||
| Pricing transparency | 29 / 35 Landing page clearly states "Free: up to 16 MP & 50 MB per image" (01_landing.png); after uploading the 4.04 MB (2048×2048) anchor PNG, the workspace explicitly discloses "1 Nero Credit will be used" before clicking Start and offers High / Low / Custom compression levels (02_result.png). | 31 / 35 Clearly states 'compress jpg, png, gif, svg, webp. Max 10 MB.' inside the upload zone (01_landing.png); advanced custom resize and rename options are clearly badged 'PRO ONLY' upfront with zero post-upload paywall. |
| Interaction restraint | 26 / 30 Provides a clean before/after zoom workspace showing "4.0MB → 2.0MB (-50.0%)" and exports the native 2048×2048 watermark-free PNG directly upon clicking Download (03_download.png). | 25 / 30 Displays Google AdSense banners above and below the workspace, but the orange 'Download' and 'Download All' buttons are clean and direct without registration popups (02_workspace.png, 03_download.png). |
| Background & reputation | 19 / 20 Developed by Nero AG (Karlsruhe, Germany; founded in 1995), a long-established multimedia software company operating the Nero AI web and mobile suite. | 18 / 20 Well-known online image optimization service operating since 2013 with strong adoption among web designers and developers. |
| Engineering & privacy | 13 / 15 HTTPS upload to ai.nero.com/api/v2/file/upload followed by asynchronous task polling (/api/v2/task/status, 6.56s server wait) and native PNG Blob export. | 14 / 15 Supports anonymous no-login compression; temporary download links are cleaned up automatically after the session. |
| Task quality | 59 / 65 Compresses the 4,237,170-byte (4,137.9 KB) 2048×2048 PNG down to 2,129,766 bytes (2,079.8 KB, -49.74%, 1.99× ratio) in High mode while preserving native PNG format, achieving PSNR = 38.19 dB and SSIM = 0.9979 (59.0/65) | 55.5 / 65 Reduces file size by 47.38% (1.90×) while achieving 38.39 dB PSNR and 0.9980 SSIM with high visual fidelity (55.5/65) |
| Deliverable specifications | 18 / 20 Preserves full 2048×2048 resolution and native PNG container without watermarks, requiring 1 free Nero Credit per task (18.0/20) | 18.5 / 20 Preserves full 2048×2048 resolution and native PNG format with one-click no-login download (18.5/20) |
| Processing speed | 12 / 15 Single-sample network timing: 5.44s upload + 6.56s server async task processing (15.36s end-to-end) (12.0/15) | 11.5 / 15 Total cloud upload and optimization time ~10.5s (~8.4s pure server processing) (11.5/15) |
