JSON formatter
Format, minify, validate and explore JSON without losing large integer precision.
Format & documents
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Everyday essentials
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Made for the everydayJSON formatter
Format, minify, validate and explore JSON without losing large integer precision.
Format & documents
jsonNew
Markdown preview
Live GFM preview with tables, task lists, syntax highlighting and HTML export.
Format & documents
markdownNew
YAML ↔ JSON converter
Convert configuration files between YAML and JSON.
Format & documents
yamlNew
SQL formatter
Format SQL queries for SQL, MySQL, PostgreSQL and SQLite.
Format & documents
sqlcurl command converter
Convert literal curl arguments between Bash, PowerShell and Windows cmd.
Format & documents
curlBase64 encoder / decoder
Convert UTF-8 text to and from standard or URL-safe Base64.
Encode & convert
base64URL encoder / decoder
Encode URLs or components, including Unicode and special characters.
Encode & convert
urlHTML entities
Escape HTML special characters or decode named and numeric entities.
Encode & convert
html-entityColor converter
Convert HEX, RGB and HSL with alpha and a live color swatch.
Encode & convert
colorUnix timestamp
Convert seconds, milliseconds and dates with local and UTC output.
Date & time
timestampCron expression parser
Explain five-field cron expressions and preview upcoming runs in a time zone.
Date & time
cronRegex tester
Test JavaScript regular expressions with matches, groups and highlighting.
Text & regex
regexNew
Text diff
Compare text line by line with clear additions and deletions.
Text & regex
diffHash generator
Generate MD5, SHA-1, SHA-256 and SHA-512 text digests.
Security & network
hashJWT decoder
Inspect a JWT’s header, payload and time claims locally.
Security & network
jwtIPv4 CIDR calculator
Calculate subnet mask, network, broadcast and usable address ranges.
Security & network
cidrHTTP status codes
Find common HTTP status codes and understand their meanings.
Security & network
http-statusUUID generator
Generate cryptographically random v4 UUIDs in batches.
Generators
uuidNew
QR code generator
Create QR codes from text or links and download a PNG.
Generators
qrcodeNew
Password generator
Generate passwords with secure randomness and configurable character sets.
Generators
passwordPractical guides
All guidesJSON
JSON large integer precision: find and prevent lost digits
Reproduce lost digits with 9007199254740993, compare raw JSON with parsed values, and learn when to use string IDs or BigInt.
Read guide TIMESTAMPUnix seconds vs milliseconds: fix dates and time zones
Compare seconds, milliseconds and ISO dates for one instant. Diagnose unit errors, UTC versus local display, and verify a date round trip.
Read guide MARKDOWNMarkdown README formatting: tables, task lists and line breaks
Build a release checklist with tables, task lists and code blocks. Fix line breaks and choose between Markdown source and HTML export.
Read guideYour data belongs on your device.
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