Kraken.io
Image compression online tool operated by Nekkra UG (Kraken.io) (Free tier + subscription)
Product node overview & trust baseline
Operator provenance, privacy baseline and site-wide pricing belong directly to the product node and are inherited across linked task edgesKraken.io, operated by Nekkra UG (Kraken.io; Germany) under a "Free tier + subscription" model, scored 47/100 in our image compression benchmark. Overall finding: The interface avoids ad interruptions, but free files are capped at 1MB and many features need Pro; this fixture was rejected, so compression quality was not tested.
Germany · 2013–Present (13-year image optimization service)
Provenance baseline: 16/20 · Operated by Germany-based Nekkra UG (founded in 2013), well-known in legacy WordPress/Magento optimization workflows.
The official pricing page lists the Free Account (100 MB testing quota; Free Web Interface capped at 1 MB/file) and five monthly/yearly tiers (yearly includes 2 months free at USD 50 / 90 / 190 / 390 / 790 per year). All paid plans include Web Interface PRO (up to 32 MB/file), API access, WordPress plugin, and Magento extension.
Pricing transparency baseline: 21/35 · Cancellation: No long-term contract; upgrade, downgrade, or cancel anytime under Account Settings. VAT applies to non-business EU customers.
Optimized files are deleted from servers after 12 hours
No third-party services listed in this record; this is not proof that none exist.
Product-level pricing & rules baseline
Verified plans, billing periods and cancellation terms owned by this product node; task-specific credit costs and free export limits are detailed per capability edge belowKraken.io API and Web Interface PRO plans (Free / Micro / Basic / Advanced / Premium / Enterprise); USD · 2026-10-21
11 plan / billing-period records, all listed; — means that period is not recorded.
The official pricing page lists the Free Account (100 MB testing quota; Free Web Interface capped at 1 MB/file) and five monthly/yearly tiers (yearly includes 2 months free at USD 50 / 90 / 190 / 390 / 790 per year). All paid plans include Web Interface PRO (up to 32 MB/file), API access, WordPress plugin, and Magento extension.
Cancellation, sources & verification record
No long-term contract; upgrade, downgrade, or cancel anytime under Account Settings. VAT applies to non-business EU customers.
Kraken.io official monthly/yearly pricing and FAQ ↗ · 2026-10-21 Capture 1 ↗ · Capture 2 ↗
Archived official pricing sources: Kraken.io official monthly/yearly pricing and FAQ (2026-10-21) [text snapshot ↗]
Capability map & linked task edges
Whenever a capability passes fixed-fixture testing, an edge is automatically linked between this product node and the task topic for horizontal comparison.
| Linked task edge | Score | Assessment · historical test | Test scope & delivery | Inspect capability / follow edge |
|---|---|---|---|---|
| Image compression | 47/100 | The interface avoids ad interruptions, but free files are capped at 1MB and many features need Pro; this fixture was rejected, so compression quality was not tested. | Blocked for files >1 MB ('File size too large. Upgrade to PRO and get 32MB max file size.') · Historical description; output not attached Historical test · 2026-10-18 Signed-in flow; paid tier not standardized · Fixed PNG fixture · Historical page record; output not attached |
Tested task edges (with scores and native artifacts) are strictly separated from discovered untested capabilities (unscored).
Peer product comparison across shared task edges
Matched by overlapping tested task edges; compare site-wide billing models alongside per-task benchmark scoresThe 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.
- Image compression：Kraken.io 47/100 vs Nero AI 88/100
Actual annual charges $59.99/$263.99. A 3-day trial is offered; cancel before expiry to avoid charges. Exact daily free count is unspecified. The 11,500-credit pack includes a current 1,500-credit bonus.
- Image compression：Kraken.io 47/100 vs PicWish 73/100
Actual annual amounts are $77/$278/$854. Absolute removal quotas and per-image credit usage are unpublished; 1×/5×/20× cannot be converted into image counts.
- Image compression：Kraken.io 47/100 vs Img2Go 80/100
Monthly and annual modes confirm annual bills USD 72 / 180. Current PDF Unlimited and all-tool TinyWow Unlimited replace the historical Supporter description. Other single-category subscriptions do not include PDF. Numeric free limits and cancellation terms remain unspecified.
- Image compression：Kraken.io 47/100 vs TinyWow 82/100
Linked capability test: Image compression
2026-10-18 · No native output attached. Page evidence alone cannot establish export specifications or file validity.
Task quality
File reduction 0% · Output size 4137.9 KB; historical record only
Detailed facts & historical record
- Measured fixture results
File reduction: 0% · Output size: 4137.9 KB
- Fixture findings
The roughly 4MB fixture exceeded the recorded 1MB free limit; free compression could not complete.
- Original historical observation
Kraken.io's free Web Interface remains stuck in a decade-old '1 MB max file size' quota (01_landing.png): when fed our 4,137.9 KB (2048×2048) benchmark PNG, the queue immediately rejects it with 'File size too large. Upgrade to PRO and get 32MB max file size.' (02_workspace.png, 03_download.png).
- Suitable uses · historical assessment
Only usable for tiny web icons/thumbnails already under 1 MB, or enterprise developers with a paid Kraken.io PRO API subscription
- Result & output evidence
No native output obtained; the preview does not establish final export quality.
Delivery capabilities
Blocked for files >1 MB ('File size too large. Upgrade to PRO and get 32MB max file size.') · Historical description; output not attached · Check watermark record
Detailed facts & historical record
- Recorded export specifications
Blocked for files >1 MB ('File size too large. Upgrade to PRO and get 32MB max file size.') · Historical description; output not attached · Check watermark record
No native output is attached; check the evidence for specification and watermark claims.
- Historical specification note · not an official maximum
Free tier capped strictly at 1 MB per file (rejects our 4.24 MB benchmark PNG; requires PRO for 32 MB)
- Watermark observation
Watermark-free (only for tiny ≤1 MB files)
- Batch & API
Supports multi-file and ZIP upload (all subject to the 1 MB/file free cap); full REST API on PRO
- Recorded free-tier dimensions
Not verified
- Attached file dimensions
Not verified
Speed & reliability
About 0.2s end to end in this run; reliability not retested
Detailed facts & historical record
- Timing observation
Network-observed server wait: 0.2s · End-to-end reference: 0.2s
- Date & fixture
2026-10-18 · anchor_compress_v1 · US-West (California, AS2914)
- Repeated tests & reliability
No standardized repetition count, success rate or variability range is recorded.
Interaction experience
Login required in this run
Detailed facts & historical record
- Account requirements
Account required in this test
- Sign-in methods
No login required for ≤1 MB; lifting the 1 MB cap requires a paid Kraken.io PRO subscription
- Manual adjustment
Not verified
- Interaction observations
No fake download ads, but steps 1, 3, and 4 (URL Paster, Image Resizing, Image Conversion) are locked behind 'available in Kraken.io PRO' and any file over 1 MB fails with a PRO upgrade prompt (03_download.png).
Background & reputation
Nekkra UG (Kraken.io) · Long-term reputation not independently verified
Detailed facts & historical record
- Service lifecycle notice
Not verified
- Operator
Nekkra UG (Kraken.io)
- Recorded origin
Germany
- Domain history record
2013–Present (13-year image optimization service)
- Background & reputation assessment
Operated by Germany-based Nekkra UG (founded in 2013), well-known in legacy WordPress/Magento optimization workflows.
- External reputation record
Not verified
Engineering & privacy
Uploaded for cloud processing；Claims deletion within 12 hours; deletion not independently verified
Detailed facts & historical record
- Processing location
Uploaded for cloud processing
- Third-party tracking record
Not verified
- Engineering & privacy assessment
Clearly states that optimized files remain available for 12 hours before automatic deletion.
- Retention statement
Claims deletion within 12 hours; deletion not independently verified
Task free allowance & pricing disclosure
Free Web Interface strictly capped at ≤1 MB per file; paid PRO unlocks 32 MB per file
Small gray footer note below dropzone ('Free Web Interface has a file size limit of 1MB') + inline error row on upload
Site-wide plans belong to the product node (see Product-level pricing baseline ↑).
Expand site-wide plans aligned for Image compression (11 records)
Kraken.io API and Web Interface PRO plans (Free / Micro / Basic / Advanced / Premium / Enterprise); USD · 2026-10-21
11 plan / billing-period records, all listed; — means that period is not recorded.
The official pricing page lists the Free Account (100 MB testing quota; Free Web Interface capped at 1 MB/file) and five monthly/yearly tiers (yearly includes 2 months free at USD 50 / 90 / 190 / 390 / 790 per year). All paid plans include Web Interface PRO (up to 32 MB/file), API access, WordPress plugin, and Magento extension.
Cancellation, sources & verification record
No long-term contract; upgrade, downgrade, or cancel anytime under Account Settings. VAT applies to non-business EU customers.
Kraken.io official monthly/yearly pricing and FAQ ↗ · 2026-10-21 Capture 1 ↗ · Capture 2 ↗
Evaluation basis & full scores · Overall 46.8/100
Overall = honesty & reputation × 30% + capability × 70%. Component maxima follow this report’s rubric. List scores are rounded for display; original precision is retained here.
Scoring version 2.3.1 · Test fixture anchor_compress_v1
Honesty & reputation · 68/100 · 30%
| Criterion | Score | Rationale | Basis |
|---|---|---|---|
| Pricing transparency | 21 / 35 | Discloses 'Free Web Interface has a file size limit of 1MB' in small gray footer text below the dropzone (01_landing.png); however, capping a 'Free Online Image Optimizer and Compressor' at 1 MB blocks almost every real-world high-res PNG/JPG that actually needs compression, immediately prompting 'File size too large. Upgrade to PRO and get 32MB max file size.' (02_workspace.png, 03_download.png). | Evidence A → |
| Interaction restraint | 21 / 30 | No fake download ads, but steps 1, 3, and 4 (URL Paster, Image Resizing, Image Conversion) are locked behind 'available in Kraken.io PRO' and any file over 1 MB fails with a PRO upgrade prompt (03_download.png). | Evidence A → |
| Background & reputation | 16 / 20 | Operated by Germany-based Nekkra UG (founded in 2013), well-known in legacy WordPress/Magento optimization workflows. | Evidence A → |
| Engineering & privacy | 10 / 15 | Clearly states that optimized files remain available for 12 hours before automatic deletion. | Evidence A → |
Capability · 37.7/100 · 70%
| Criterion | Score | Rationale | Basis |
|---|---|---|---|
| Task quality | 20 / 65 | Rejects our 4,137.9 KB (4.24 MB) standard 2048×2048 PNG benchmark anchor due to its strict 1 MB free file size cap (20.0/65) | Evidence B → |
| Deliverable specifications | 7.7 / 20 | Free tier is restricted to files ≤1 MB, preventing free export of standard high-resolution PNG/JPG images (7.7/20) | Evidence B → |
| Processing speed | 10 / 15 | Client-side size check rejects >1 MB files in 0.2s with a PRO upgrade notice (10.0/15) | Evidence B → |
Legacy scores may include advertised maximum capabilities. Read tested output separately from paid capabilities. Records without matching tiers and scope are not ranked together.
Developer & citation kit · Claim updates, request benchmarks & embed verified badges
Product developers and writers can embed these SVG badges in official websites, GitHub READMEs or documentation, or use the channels below to sync product-wide plans and capabilities.
[](https://realtest.org/tools/kraken.io/) <a href="https://realtest.org/tools/kraken.io/"><img src="https://realtest.org/badges/kraken.io.svg" alt="Kraken.io — RealTest" height="24" /></a> 
[](https://realtest.org/tools/kraken.io/#feature-image-compressor)