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JSON & data

YAML

YAML Flattener / Unflattener YAML to JSON

XML

XML Formatter XML Linter XML to JSON XML to HTML XPath Tester

CSV

CSV Viewer CSV Cleaner

CSV to JSON CSV to Table CSV Splitter & Merger SQL INSERT to CSV

TOML, .env & properties

TOML to YAML Env File Converter Properties Converter TOML Linter

Files

Encode & convert

Text & writing

Web & design

Dev & ops

Security

Generate & media

Calculators & reference

English

Changelog Attributions

© 2026 Daniel Chen

PrismKit

Data Formats

XSLT Tester

XSLT Tester

Runs in your browserLocal

Apply an XSLT stylesheet to an XML document and see the transformed result.

XPath Tester

Evaluate an XPath expression against an XML document and inspect the nodes it selects.

CSV Viewer

Open a CSV or TSV file as a sortable, filterable table with per-column stats, all in your browser.