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40 tools availableJSON to TypeScript
Turn sample JSON into practical TypeScript types.
JSON to JSON Schema
Create a draft 2020-12 schema from one JSON example, including required properties, array item alternatives and primitive types.
JSON Pointer explorer
Look up an exact RFC 6901 path in a JSON document, including keys containing slashes and tildes.
JSON Patch workbench
Generate RFC 6902 operations between two documents, or apply a patch to a copy of the original.
NDJSON validator & converter
Validate newline-delimited JSON and convert it to a JSON array, or emit one compact JSON record per line from an array.
.env checker & comparison
Compare .env files and spot configuration changes.
.gitignore rule tester
Check relative file paths against ordered Git ignore rules, including negation and directory exclusions.
EditorConfig generator
Build a portable .editorconfig with explicit indentation, line endings, encoding and final-newline preferences.
package.json dependency diff
Compare declared dependency ranges across package.json files and spot additions, removals, version changes and section moves.
SemVer range tester
Test stable or prerelease semantic versions against an npm-style range without contacting a package registry.
cURL to Fetch
Convert a cURL command to readable Fetch code.
HTTP request parser
Inspect a pasted HTTP/1.x request line, duplicate headers and body as structured JSON.
Set-Cookie inspector
Inspect one or more pasted Set-Cookie header lines and flag common Secure, SameSite and cookie-prefix mistakes.
Query parameter batch editor
Edit duplicate query parameters in a URL by applying explicit set, append and delete operations.
MIME Accept matcher
Rank available media types against a pasted HTTP Accept header, using quality weights and specificity.
Fluid CSS clamp builder
Calculate a fluid CSS value between two viewport widths and emit a clamp expression with a live size preview.
CSS easing curve editor
Build a cubic-bezier timing function, preview a moving marker and inspect progress samples.
CSS Grid layout builder
Generate a responsive grid declaration and preview labeled cells at your chosen column count and spacing.
SVG path metrics
Measure the bounding box and total geometric length of an SVG path using your browser’s native SVG engine.
HTML table to JSON
Convert a pasted HTML table into records using its first row as column headers.
Integer & bitwise workbench
Convert signed integers across bases and apply fixed-width bitwise operations with exact BigInt arithmetic.
IEEE 754 float inspector
Inspect the rounded value, sign, exponent and fraction bits of a 32-bit or 64-bit IEEE 754 floating-point number.
Byte order converter
Reverse byte order within fixed-width words and inspect both the big-endian and little-endian interpretations.
Local file hex viewer
Inspect the first 64 KiB of a local file as byte offsets, hexadecimal values and printable ASCII, without an upload.
Text encoding & BOM inspector
Inspect a local text file for a byte-order mark and decode it as UTF-8, UTF-16LE or UTF-16BE with explicit error handling.
Cron schedule explorer
Explain a standard five-field cron expression and list its next five execution times in UTC after a chosen reference time.
Seeded JSON fixture generator
Create deterministic test records from a small field specification.
Log filter & field extractor
Filter log lines by a literal substring, then optionally extract a named JSON field or a whitespace-delimited column.
Stack trace organizer
Separate stack traces into frame and message lines, optionally remove duplicate frames, and filter by a literal source fragment.
SQL INSERT fixture builder
Turn a JSON array of records into SQL INSERT statements with escaped identifiers, typed scalar literals and explicit null handling.
HAR request analyzer
Inspect recorded requests in a local HAR archive.
Cache-Control inspector
Explain a pasted HTTP response Cache-Control value, show freshness settings, and flag contradictory or suspicious directive combinations.
OpenAPI operation browser
Browse a local OpenAPI 3.0 or 3.1 JSON document as a searchable operation index, with merged parameters and response summaries.
SQL placeholder converter
Convert anonymous ? parameters to PostgreSQL $1 numbering, or convert numbered parameters to ?.
CSS specificity calculator
Calculate and compare CSS selector specificity.
CSS variable dependency analyzer
Build a static dependency graph for CSS custom properties, find undeclared references and identify possible cycles before debugging the cascade.
ANSI log cleaner
Remove ANSI terminal control sequences from copied logs while preserving ordinary Unicode text, tabs and line breaks.
Base32 text codec
Encode and decode UTF-8 text with Base32.
ULID generator & inspector
Generate ULIDs or inspect their encoded timestamps.
Retry backoff planner
Plan retry delays and cumulative waiting time.
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