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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 | online-convert.com | ShortPixel | Switch / compare |
|---|---|---|---|
| Image compression | 90/100 2048 × 2048 · PNG | 86/100 2048 × 2048 · PNG | Active task |
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Browse this task →| Criterion | Online-Convert Compress PNG Image compression 90/100 Seven-aspect task score Veteran German file conversion platform offering guest PNG compression (2048×2048) with 55.99% size reduction, 39.27 dB PSNR, 0.9984 SSIM, and intact alpha channel in 7.5s server wait. Tested export 2048 × 2048 · PNG Historical test · 2026-11-02 | ShortPixel Online Image Compressor Image compression 86/100 Seven-aspect task score Login-free access offers three compression modes without third-party ads and discloses batch and size limits; this run cut size about 68% using cloud processing. Tested export 2048 × 2048 · PNG Historical test · 2026-10-18 |
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| Pricing & rules | ||
| Pricing plans | Online-Convert free trial credits, Pay As You Go packages and subscriptions · 2026-10-31 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free Trial2026-10-31 ↗ Free Free Free 16 free trial credits upon signup without payment details Supports evaluation of most conversion and compression tools；Shared standard queue with file size limits；No automatic renewal；Valid until credits exhausted Pay As You Go (240 Credits)2026-10-31 ↗ USD 8 · one-time payment Usage / one-time Usage / one-time 240 credits ($0.0333/credit), valid for 1 year Access to all tools, no waiting queue, priority processing Rules [1] [2] [3]Pay As You Go (480 Credits)2026-10-31 ↗ USD 14 · one-time payment Usage / one-time Usage / one-time 480 credits ($0.0292/credit), valid for 1 year Full tools access, zero wait queue, ad-free experience Rules [1] [2] [3]Monthly Subscription (2800 Credits)2026-10-31 ↗ USD 29/month — Monthly 2800 credits per month (up to 2800 standard tasks or 350 AI tasks) All features, no waiting queue, batch concurrent processing, no ads；Unused monthly credits do not roll over；Renews monthly, cancel anytime in dashboard；Valid during active billing period Annual Subscription (2800 Credits/mo)2026-10-31 ↗ — Annual price not verified Annual 2800 credits per month; UI states $23.17 USD/month equivalent without full annual total All features, no waiting queue, batch concurrent processing, no ads；Annual billing total not stated upfront; held as null with partial coverage；Renews annually；Valid during annual period 5 plan / billing-period records, all listed; — means that period is not recorded. Anonymous conversions for basic files; 16 free trial credits upon registration; Pay As You Go packs: 240 credits for $8, 480 for $14; monthly subscription $29/mo for 2800 credits; annual plans state monthly equivalents without full upfront invoice total. Verification has gaps; unknown prices and quotas are not inferred. Cancellation, sources & verification recordCancellation and refund terms unverified Online-Convert Plans & Pricing ↗ · 2026-10-31 Capture 1 ↗ | ShortPixel free web tool, one-time non-expiring credit packs, and annual unlimited plans; USD · 2026-10-21 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free Web / Free Plan2026-10-21 ↗ Free Free Free Web tool free without login up to 50 images/batch and ≤10 MB/file (login removes 10 MB limit); Free account includes 100 credits/month. One-time 30K2026-10-21 ↗ USD 19.99 · one-time payment Usage / one-time Usage / one-time 30,000 credits (never expire) + 100 AI credits/month + 150 GB CDN traffic across unlimited websites. Rules [1] One-time 50K2026-10-21 ↗ USD 29.99 · one-time payment Usage / one-time Usage / one-time 50,000 credits (never expire) + 100 AI credits/month + 250 GB CDN traffic across unlimited websites. Rules [1] One-time 100K2026-10-21 ↗ USD 49.99 · one-time payment Usage / one-time Usage / one-time 100,000 credits (never expire) + 100 AI credits/month + 500 GB CDN traffic across unlimited websites. Rules [1] One-time 250K2026-10-21 ↗ USD 99 · one-time payment Usage / one-time Usage / one-time 250,000 credits (never expire) + 100 AI credits/month + 1.25 TB CDN traffic across unlimited websites. Rules [1] Unlimited Yearly2026-10-21 ↗ — Annual price not verified Annual Unlimited monthly credits, unlimited websites, 100 AI credits/month, 500 GB CDN/month; card displays USD 8.33/month equivalent (2 Months Free). Card displays only the USD 8.33/month equivalent ("Saving $31.98 / year") without printing the annual invoice total. Unlimited AI Yearly2026-10-21 ↗ — Annual price not verified Annual Unlimited compression and AI credits (including AI background removal and upscaling), 500 GB CDN/month; card displays USD 13.33/month equivalent. Card displays only the USD 13.33/month equivalent ("Saving $31.98 / year") without printing the annual invoice total. 7 plan / billing-period records, all listed; — means that period is not recorded. The online web compressor is free without login for files ≤10 MB (login removes the 10 MB limit; free plan includes 100 credits/month). The pricing page lists four non-expiring one-time credit packs (30K at USD 19.99, 50K at USD 29.99, 100K at USD 49.99, and 250K at USD 99.00). The Unlimited Yearly cards display only monthly equivalents (USD 8.33/month and USD 13.33/month, "Saving $31.98 / year") without printing the annual invoice total on the card, so the annual totals are kept unverified. Verification has gaps; unknown prices and quotas are not inferred. Cancellation, sources & verification recordOne-time credit packs never expire; subscriptions can be cancelled anytime in the account dashboard under official Terms. ShortPixel official pricing page (annual plans and one-time credit packs) ↗ · 2026-10-21 Capture 1 ↗ · Capture 2 ↗ |
| Free & trial allowance on the test date | Guest users can compress everyday files directly; 16 trial credits granted upon registration | Up to 50 files per batch and 10 MB per file without login; free access to Lossy, Glossy, and Lossless modes |
| Cancellation & refunds | Not verified | One-time credit packs never expire; subscriptions can be cancelled anytime in the account dashboard under official Terms. |
| Disclosure of costs & limits | Transparent upfront free tier disclosure and clear credit packs with zero post-conversion paywall traps | Discloses 'maximum 10Mb. Login to remove the restriction.' upfront below the dropzone |
| Task quality | ||
| Measured fixture results | File reduction: 55.99% · Output size: 1821 KB | File reduction: 67.54% · Output size: 1343 KB |
| Fixture findings | Guest export of native 2048×2048 PNG (1.8 MB · -55.99%) with high visual fidelity (39.27 dB PSNR, 0.9984 SSIM) and intact alpha channel in 7.5s server wait. | Offers three modes without login; the default reduced this fixture by about 68%, with quality trade-offs to inspect. |
| Original historical observation | Online-Convert cloud backend compressed the 4,137.9 KB anchor image to 1,821.0 KB (55.99% reduction) in 7.5s server wait, achieving 39.27 dB PSNR and 0.9984 SSIM while maintaining sharp text edges and clean transparency. | ShortPixel's online compressor is completely ad-free, discloses its 10 MB guest limit upfront (01_landing.png), and freely unlocks Lossy, Glossy, and Lossless modes. In default Lossy mode, it shrinks our 4,137.9 KB PNG to 1,343.0 KB (-67.54%, 3.08× ratio, 02_workspace.png) at 34.72 dB PSNR and 0.9954 SSIM. |
| Suitable uses · historical assessment | Users seeking a trusted guest-usable tool to shrink PNG files by over 50% with high fidelity (PSNR 39.27 dB, SSIM 0.9984) and cloud batch workflows | Webmasters and designers who want an ad-free workspace with free access to Lossy, Glossy (photographer-grade), 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 (original size watermark-free PNG) | 2048×2048 full-resolution PNG free direct export (up to 10 MB and 50 files without login) |
| Watermark observation | Watermark-free | Watermark-free |
| Batch & API | Supports batch queuing and advanced conversion parameter tuning | Supports up to 50 files per batch on web, plus WordPress plugins and REST API |
| 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: 7.5s | Network-observed server wait: 9.8s · End-to-end reference: 12.2s |
| Date & fixture | 2026-11-02 · 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 | Basic compression usable without login; email/password, Google, and Apple login supported for advanced tiers | No login required (free account login removes the 10 MB per-file cap) |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Not verified | Clean workspace with zero third-party ad banners, offering Lossy / Glossy / Lossless mode toggles and direct one-click PNG download from the thumbnail card (02_workspace.png, 03_download.png). |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | QaamGo Media GmbH | ShortPixel (ID Scout SRL) |
| Recorded origin | Cologne, Germany | Bucharest, Romania (EU GDPR compliant) |
| Domain history record | Domain registered in 2009 (operating for over 15 years) | 2014–Present (12-year image optimization specialist) |
| Background & reputation assessment | Not verified | Operated by ShortPixel (ID Scout SRL, founded in 2014), one of the most widely installed image optimization providers in the WordPress ecosystem. |
| External reputation record | Established German file conversion suite with transparent EU corporate and GDPR disclosures. | Not verified |
| Engineering & privacy | ||
| Processing location | Uploaded for cloud processing | Uploaded for cloud processing |
| Third-party tracking record | Google Analytics · Google AdSense | Not verified |
| Engineering & privacy assessment | Not verified | Processes images via ShortPixel's GDPR-compliant European cloud cluster without requiring personal details for guests. |
| Retention statement | Claims deletion within 24 hours; deletion not independently verified | Explicit retention period unconfirmed; inspect policy record |
| Evaluation basis | ||
| Pricing transparency | 32 / 35 Clearly states right below the dropzone: 'Drop up to 50 files here to optimize. Compress JPG, GIF and PNG online. The files should have maximum 10Mb. Login to remove the restriction.' (01_landing.png). | |
| Interaction restraint | 26 / 30 Clean workspace with zero third-party ad banners, offering Lossy / Glossy / Lossless mode toggles and direct one-click PNG download from the thumbnail card (02_workspace.png, 03_download.png). | |
| Background & reputation | 18 / 20 Operated by ShortPixel (ID Scout SRL, founded in 2014), one of the most widely installed image optimization providers in the WordPress ecosystem. | |
| Engineering & privacy | 14 / 15 Processes images via ShortPixel's GDPR-compliant European cloud cluster without requiring personal details for guests. | |
| Task quality | 60 / 65 Size Reduction: -55.99% (4137.9 KB → 1821 KB, 2.27× ratio) · PSNR: 39.27 dB · SSIM: 0.9984 | 54.3 / 65 Reduces file size by 67.54% (3.08×) with 34.72 dB PSNR and 0.9954 SSIM, balancing strong compression with clean visual fidelity (54.3/65) |
| Deliverable specifications | 20 / 20 Clean unwatermarked export (8/8); Export spec: 2048 × 2048 (original size watermark-free PNG) | 19 / 20 Preserves full 2048×2048 resolution and native PNG format while offering free Lossy/Glossy/Lossless mode switching (19.0/20) |
| Processing speed | 12 / 15 Network-observed server wait: 7.5s (API mode: async_verified; network upload N/A / end-to-end N/A shown for reference only, never penalized) | 11 / 15 Cloud SmartCompress processing takes ~9.8s (~12.2s end-to-end) (11.0/15) |
