ViewKit vs SEOpeck

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

ViewKit compared with SEOpeck
Detail	ViewKit	SEOpeck
What it does	Free in-browser viewer for scientific and ML data files	Free web tools for SEO, code and everyday tasks
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Not given	Free
Pricing	Free	Not given
Key features	Browse HDF5 groups, datasets and attributes Read Parquet schemas, row groups and column statistics Open Zarr v2 and v3 stores from a folder or a zip Inspect Apache Arrow and Feather files View CSV, TSV and Excel spreadsheets Load NumPy .npy and .npz arrays List safetensors tensors and step through TFRecord records Slice N-dimensional arrays and render heatmaps Parse every file locally, with no upload Work offline after page loads	On-Page SEO Checker to audit page titles, meta tags, headings, images, links, canonical and structured data Website Speed Test with Google PageSpeed Insights and Core Web Vitals Image Compressor to shrink JPG, PNG and WebP images in bulk and resize JSON Beautifier to format, validate and minify JSON Broken Link Checker to find broken links, dead images and redirects DNS Lookup to fetch domain DNS records Website SEO Audit to crawl up to 100 pages and find missing titles and duplicate descriptions Password Generator to create strong random passwords QR Code Generator to turn links into scannable QR codes PDF tools including merge, split, compress, rotate, sign and watermark
What makes it different	All data processing happens in your browser with no server uploads Opens very large files by reading only the bytes you view No installation, account or login required Comprehensive articles explaining data format specifications	348 free tools with no sign-up required Most tools run in your browser so files stay on your device No accounts, no trials, no restrictions on tool usage Tools have no daily limits and light rate limits keep service fast Plain explanations for every result, not just numbers
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	Not checked yet no change since last check	3 no change since last check
Trust Flow (Majestic)	0	2
Citation Flow (Majestic)	22	19
Referring domains (Majestic)	20	10

3 details filled in for both companies.

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