SleekView Charts for Kraken.io: optimization as a dashboard
Kraken.io Image Optimizer records per-attachment optimization status, original and kraked bytes, lossy or lossless mode, and chroma subsampling settings to postmeta. SleekView Charts reads that data and turns it into a reporting dashboard for performance leads, agencies, and editorial teams managing image-heavy sites.
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A savings dashboard built from Kraken.io postmeta
Kraken.io stores optimization results on each attachment in postmeta keys like _kraked_size and _kraken_thumbnail_data, with original bytes, kraked bytes, and the optimization mode (lossy or lossless) recorded for the full image and every thumbnail. The Media Library 'Kraked Size' column and the bulk Krak 'em all overlay show progress, but the audit-shaped questions a performance team has after a few months live a layer down.
SleekView Charts reads the same postmeta and turns it into a configurable dashboard. Number cards show total bytes saved across the library. Pie cards split attachments by optimization mode (lossy versus lossless). Bar cards rank thumbnail sizes by savings so a performance lead can see which size pulls the most weight. Area cards trace savings by upload year to plan the next focused round.
Every card reads through the postmeta Kraken.io already writes, so the API credentials, the bulk queue, and the kraked file storage remain authoritative. The dashboard answers the cross-cutting questions the per-attachment dialog never could: how much has the lossy mode bought over lossless, which year still holds heavy uncompressed images, and what share of the library has been kraked.
Workflow
From Kraken.io postmeta to an optimization dashboard
Connect to attachments and postmeta
Switch to the Charts view
Pin the optimization dashboard
Filter across cards
Sample dashboard
Charts you can build from Kraken.io data
Total bytes saved
Sum(kraked_savings)
Lossy vs lossless mode
Count
group by optimization_mode
Top thumbnail sizes by savings
Sum(kraked_savings)
group by thumbnail_size_key
Savings by upload year
Sum(kraked_savings)
group by post_date
Comparison
Default Kraken.io admin vs SleekView Charts
Default Kraken.io admin
- Kraked Size column lists per-image savings, not a portfolio view
- Krak 'em all overlay shows progress but no chart layout
- Lossy versus lossless split has no visual surface in the admin
- Savings per thumbnail size require manual postmeta inspection
- Yearly trend of optimization adoption is not surfaced anywhere
SleekView Charts
-
Number card summing bytes saved from
_kraked_size - Donut card for lossy versus lossless split across the library
- Bar card ranking thumbnail sizes by total savings
-
Area card for savings bucketed by
post_dateper year - All cards filter together by MIME type, mode, or upload year
Features
What SleekView Charts gives you for Kraken.io Image Optimizer
Savings as a dashboard
Replace the Kraked Size column scroll with a dashboard that answers performance questions directly. Total saved, lossy versus lossless mix, per-size split, and yearly trend on one screen for the whole library.
Lossy versus lossless at a glance
The mode donut surfaces exactly how much of the library was optimized in intelligent lossy mode versus lossless. Combined with the year filter, the trend of mode adoption across the library becomes obvious.
Plan the next krak run
An area chart of savings by upload year shows which sections of the site benefit most from a focused round. Performance leads see exactly which legacy uploads should go through the next Krak 'em all sweep first.
Audience
Who builds Kraken.io dashboards with SleekView
Performance leads
Open the dashboard before a Core Web Vitals push. Total saved, lossy versus lossless split, and the per-size breakdown replace a sticky-note running list of attachments still on the unoptimized pile.
Agencies on retainer
Hand a client a quarterly optimization dashboard scoped to their library. Total saved, the mode split, and the yearly trend make the retainer report write itself instead of being a one-off postmeta query.
Editors managing the kraken quota
Read the unoptimized slice of the status donut to see what's still pending against the monthly quota. Plan the next bulk Krak run within the quota instead of stumbling into the cap mid-month.
The bigger picture
Why Kraken.io optimization data needs a chart surface
Image optimization is a long tail. The first Krak 'em all run handles the existing library, but every new upload, every newly registered thumbnail size, every mode switch from lossless to lossy, and every theme change adds rows that drift away from the clean baseline. Kraken.io records all of it on the attachment in postmeta the WordPress media library does not surface as columns, and the Kraked Size column answers only the per-image question.
The audit-shaped questions a performance team has after a few months of operation, which year of uploads has the heaviest tail, which optimization mode is doing the most work, what share of the library is still on the unoptimized pile, live a layer down. SleekView Charts reads the same postmeta and gives those answers as a dashboard. The plugin keeps doing the kraking work; performance leads, agencies, and editorial teams finally have the dashboard that turns guesses into precise per-mode and per-year numbers.
Questions
Common questions about SleekView Charts for Kraken.io Image Optimizer
No. SleekView Charts is an admin reporting surface that reads the same _kraked_size and _kraken_thumbnail_data postmeta Kraken.io already writes. Optimization, API credentials, the bulk queue, and the kraked file replacement continue to be Kraken.io's job. The dashboard is purely a reading layer.
Yes. Kraken.io writes the optimization mode into _kraken_thumbnail_data on each kraked attachment, so the donut card splits the library cleanly between intelligent lossy and lossless. A second filter by MIME type lets you see whether JPEGs go lossy and PNGs go lossless as expected.
Yes. Kraken.io optimizes JPEG, PNG, and GIF (including animated GIF), and writes the same postmeta shape on each. The dashboard treats GIF attachments as rows in the same charts, so a portfolio with mixed media types shows the full picture.
Yes. _kraken_thumbnail_data carries per-size rows including the size key, original bytes, and kraked bytes. A horizontal Bar card grouped by size key surfaces which thumbnail pulls the most weight and which can be turned off in Settings -> Kraken.io for credit savings.
No. Charts are computed against the postmeta indexes WordPress already maintains, with SleekView caching aggregation results between renders. The first paint may take a moment on very large libraries, subsequent loads are immediate even with hundreds of thousands of attachments.
Yes. The dashboard has a top-level filter bar that applies across all cards. Picking a MIME type narrows every card on the screen so a JPEG-only or PNG-only audit is one filter away from the library-wide view of total savings and mode split.
Yes. Each card supports a CSV export of its underlying aggregation. Export the per-size savings ranking for an internal performance memo, or export the yearly savings trend for a quarterly client report. The export contains the same rows the chart counts.
Yes. SleekView Charts never touches the kraked files or the original images. The Kraken.io reset metadata feature, the re-kraking workflow, and the per-image Optimize This Image action remain authoritative. The dashboard reports on the optimization state without changing it.
Pricing
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