Free online data tools

4 tools

Tools for looking at and reshaping data without a spreadsheet or a database: CSV viewers, JSON explorers, SQL playgrounds and converters between table formats. Check the size limit and whether files are processed locally before you load anything sensitive.

Showing 1–4 of 4

0.590score
Paste a CSV, Get a Codebook
zoltlabs
Reads a CSV in the page and reports each column's type, gaps, spread and outliers, then drafts a data dictionary to copy.
ArtifactNo sign-upIn-browserdata tools
0.556score
K-means Clustering Explorer
ncssm
Animated k-means run on a random point set, with data reset and speed control until the clusters converge.
ArtifactNo sign-updata tools
0.477score
Census Explorer (Claude build)
Simon Willison
Search places and view American Community Survey demographics through the Census Reporter API.
ArtifactNo sign-updata tools
0.477score
JSON String Extractor
Simon Willison
Pulls out every string in a JSON document that is long or contains line breaks.
ArtifactNo sign-updata tools