Tool index

Next step: JSONFormat compact API responses before copying them into code or docs Next step: URLEncode values before nesting them inside query strings.

Cron Expression Generator

Build and explain five-field cron expressions for common scheduling tasks.

Build common recurring schedulesExplain five-field crontab expressionsCompare next run previews across browser and server timezones

Next step: TimestampPaste Unix seconds, milliseconds, or an ISO string.Next step: TimezoneCheck scheduling and log times across regions.

Meta Tag Generator

Create title, description, canonical, Open Graph, and X card tags for web pages.

Generate SEO and social sharing tagsCreate canonical and robots tagsPrepare Open Graph previews

Next step: OG PreviewPreview how a shared page card might read.Next step: RobotsCreate simple crawl directives for a public site.

JSON Formatter

Format, minify, and validate JSON payloads without sending them to a server.

Format compact API responses before copying them into code or docsValidate JSON syntax and locate parse errors quicklyFind the line, column, and local context for a JSON parse error

Next step: JSON EscapeEscape text for JSON string values or unescape copied JSON string content.Next step: JSON TSGenerate starter interfaces from example API responses.

JSON Escape Unescape

Escape and unescape JSON string content for logs, fixtures, and embedded payloads.

Escape text for JSON string values or unescape copied JSON string content.JSON Escape Unescape for data workflows{"message":"Hello Bob"}

Next step: JSONFormat compact API responses before copying them into code or docs Next step: SchemaCheck required fields and primitive types in test payloads.

JWT Decoder

Decode JWT header and payload segments locally for quick inspection.

Decode JWT header and payload segments while debugging API authenticationCheck exp, iat, nbf, iss, aud, scope, and subject claims before sharing a tokenCompare expected issuer, audience, and scope values against a copied API token

Next step: Base64Decode copied Base64 payloads from logs Next step: TimestampPaste Unix seconds, milliseconds, or an ISO string.

URL Encoder

Encode and decode URL components for query strings, redirects, and callbacks.

Encode values before nesting them inside query strings.URL Encoder for web workflowshttps://example.com/callback?state=a b

Next step: URL ParseInspect redirects, callback URLs, and query parameters.Next step: Base64Decode copied Base64 payloads from logs

Base64 Encoder Decoder

Encode, decode, and inspect Base64, Base64URL, image data URLs, JSON payloads, and JWT segments locally in the browser.

Decode copied Base64 payloads from logsPreview and download Base64 image data URLs before copying binary outputConvert text to Base64 for fixtures

Next step: JWTDecode JWT header and payload segments while debugging API authentication Next step: URLEncode values before nesting them inside query strings.

Regex

Test JavaScript regular expressions, inspect matches, and keep common patterns close by.

Cron

Build and explain five-field cron expressions for common scheduling tasks.

Time

Meta Tags

Create title, description, canonical, Open Graph, and X card tags for web pages.

SEO

JSON

Format, minify, and validate JSON payloads without sending them to a server.

JSON Escape

Escape and unescape JSON string content for logs, fixtures, and embedded payloads.

JWT

Decode JWT header and payload segments locally for quick inspection.

Security

URL

Encode and decode URL components for query strings, redirects, and callbacks.

Web

Base64

Encode, decode, and inspect Base64, Base64URL, image data URLs, JSON payloads, and JWT segments locally in the browser.

Timestamp

Convert Unix timestamps, milliseconds, and ISO strings into readable dates.

Time

UUID

Generate UUID v4 values in bulk for fixtures, traces, and test data.

Hash

Generate MD5, SHA-1, SHA-256, SHA-512, and HMAC signatures locally.

Security

Diff

Compare two text blocks with line or word level differences.

Text

Developer workbench

Format payloads, test patterns, inspect tokens, generate metadata, compare text, and convert values without leaving a single domain.

Browser local

Format an API response

Clean a pasted JSON payload, inspect paths, then create types or schema checks.

Extract a JSON field

Format the payload, test a path with wildcards or recursive keys, then keep the shape for code.

Decode an API token

Inspect JWT claims, check time fields, and compare encoded segments safely.

Debug a redirect

Check status, final URL, DNS target, and social preview signals in one path.

Inspect an image data URL

Preview Base64 image data, confirm the MIME type, then check presentation contrast before sharing.

Check a DNS deployment

Verify records, HTTP reachability, sitemap exposure, and robots rules after a domain change.

Create a Wi-Fi QR

Generate a compatible network password, build the Wi-Fi payload, and check contrast before sharing.

Generate a secure token

Create random session/API/CSRF values, compare hashes, and choose identifiers deliberately.

Review security headers

Check response headers, draft a CSP, then confirm the URL and DNS target are the site you meant to protect.

Validate deploy config

Validate YAML or Compose structure, inspect environment values, then format JSON config fragments before shipping.

Clean CSV for API use

Trim CSV rows, remove duplicates, convert to JSON, and make a quick Markdown table for review.

Related tools

Useful next steps

Tools

JSON Formatter

Format, minify, and validate JSON payloads without sending them to a server.

Next step: JSON EscapeEscape text for JSON string values or unescape copied JSON string content.Next step: JSON TSGenerate starter interfaces from example API responses.Next step: SchemaCheck required fields and primitive types in test payloads.

YAML Validator

Validate YAML syntax, format YAML, and inspect Docker Compose services for config, CI, and documentation files.

Next step: ENV CheckValidate .env snippets before moving values into hosting or CI settings.Next step: YAML JSONConvert configuration snippets between YAML and JSON.Next step: JSONFormat compact API responses before copying them into code or docs

JWT Decoder

Decode JWT header and payload segments locally for quick inspection.

Security

Next step: TimestampPaste Unix seconds, milliseconds, or an ISO string.Next step: Base64Decode copied Base64 payloads from logs Next step: HashGenerate repeatable hashes for checksums and debugging

HTTP Status Checker

Check HTTP status, redirect diagnostics, final URL, response headers, pasted header blocks, and CSP drafts for public URLs.

Network

Next step: DNSInspect public A and AAAA records for deployment readiness Next step: Meta TagsGenerate SEO and social sharing tags Next step: OG PreviewPreview how a shared page card might read.

Color Converter

Convert HEX, RGB, and HSL colors and inspect WCAG AA/AAA contrast diagnostics.

Color

Next step: CSSReview copied CSS snippets before sharing.Next step: CSS UnitConvert spacing and typography values between common CSS units.Next step: ClampGenerate fluid CSS values with min and max bounds.

UUID Generator

Generate UUID v4 values in bulk for fixtures, traces, and test data.

Next step: PasswordCreate local test credentials or temporary account secrets Next step: QR CodeCreate QR PNGs for public URLs Next step: TokenGenerate local session or refresh tokens

Regex Tester

Test JavaScript regular expressions, inspect matches, and keep common patterns close by.

Next step: JSFormat pasted JavaScript before reviewing it.Next step: SQLPretty-print compact SQL and compare query revisions.Next step: DiffPaste two versions to see added and removed lines or words.

Code

11 Tools

regex testerregular expression testerjavascript regex

Regex Tester

Test JavaScript regular expressions, inspect matches, and keep common patterns close by.

uuid generatoruuid v4random uuid

UUID Generator

Generate UUID v4 values in bulk for fixtures, traces, and test data.

sql formatterformat sqlsql beautifier

SQL Formatter

Format SQL queries for readable reviews and debugging.

json to typescriptjson to interfacetypescript interface generator

JSON to TypeScript

Infer TypeScript interfaces from sample JSON objects.

css formattercss beautifierformat css

CSS Formatter

Format CSS rules and inspect selectors, at-rules, custom properties, color tokens, and minified size.

css minifierminify csscompress css

CSS Minifier

Minify CSS and review compression ratio, comment removal, selector risk, and token counts.

javascript formatterjs formatterformat javascript

JavaScript Formatter

Format JavaScript snippets and inspect functions, imports, exports, async usage, browser APIs, and copy risks.

javascript minifierjs minifierminify javascript

JavaScript Minifier

Minify JavaScript snippets and review compression ratio, comment removal, browser APIs, fetch calls, and console logs.

ulid generatorsortable id generatorunique id generator

ULID Generator

Generate sortable ULID identifiers for logs, fixtures, and test records.

css unit converterpx to remrem to px

CSS Unit Converter

Convert px, rem, em, and percent values for CSS layout calculations.

css clamp generatorfluid typographyresponsive font size

CSS Clamp Generator

Generate CSS clamp() expressions for responsive font sizes and spacing.

Time

3 Tools

TimeBrowser local

Cron Expression Generator

Build and explain five-field cron expressions for common scheduling tasks.

cron generatorcron expressioncrontab examples

TimeBrowser local

Timestamp Converter

Convert Unix timestamps, milliseconds, and ISO strings into readable dates.

timestamp converterunix timestampepoch converter

TimeBrowser local

Timezone Converter

Compare a date and time across common IANA time zones.

timezone convertertime zone converterutc converter

SEO

5 Tools

meta tag generatorseo meta tagsopen graph generator

Meta Tag Generator

Create title, description, canonical, Open Graph, and X card tags for web pages.

robots.txt generatorrobots txtgenerate robots.txt

Robots.txt Generator

Generate robots.txt rules with sitemap and crawl controls.

sitemap generatorxml sitemapgenerate sitemap

Sitemap Generator

Generate XML sitemap entries from a list of public URLs.

open graph previewog previewsocial preview

Open Graph Preview

Preview Open Graph title, description, URL, and image fields.

favicon generatorsvg favicongenerate favicon

Favicon Generator

Generate a simple SVG favicon and HTML link tags from text and colors.

Web

8 Tools

iframe viewerresponsive previewiframe generator

Iframe Viewer

Preview URLs inside common viewport frames and copy basic iframe markup.

url encoderurl decoderencodeURIComponent

URL Encoder

Encode and decode URL components for query strings, redirects, and callbacks.

html entity encoderhtml entity decoderescape html

HTML Entity Converter

Encode and decode HTML entities for snippets, docs, and templates.

qr code generatorqr generatorwifi qr code

QR Code Generator

Generate downloadable QR codes with URL, Wi-Fi, email, and vCard payload builders plus scan diagnostics.

html formatterhtml beautifierformat html

HTML Formatter

Beautify compact HTML snippets for templates and documentation.

url parserparse urlquery string parser

URL Parser

Break URLs into protocol, host, pathname, query params, hash, and origin.

mime type lookupcontent type lookupfile mime type

MIME Type Lookup

Look up common MIME types by file extension or content type.

user agent parserparse user agentbrowser detector

User-Agent Parser

Parse browser, OS, engine, and device hints from a user-agent string.

Text

7 Tools

lorem ipsum generatorplaceholder textdummy text generator

Lorem Ipsum Generator

Generate placeholder copy for product mocks, forms, cards, and content layouts.

text diffdiff checkercompare text

Text Diff

Compare two text blocks with line or word level differences.

case convertercamel case convertersnake case converter

Case Converter

Convert text between lower, upper, title, camel, pascal, snake, and kebab case.

slug generatorurl slugslugify

Slug Generator

Create URL-safe slugs from titles, labels, and filenames.

markdown previewermarkdown editorpreview markdown

Markdown Previewer

Preview Markdown text and generate Markdown tables from CSV, TSV, or pipe-separated rows.

sort linesremove duplicate linesdedupe text

Text Sort and Dedupe

Sort lines, remove duplicates, trim blanks, and normalize pasted lists.

word countercharacter counterline counter

Word Character Counter

Count characters, words, lines, bytes, and estimated reading time.

Data

10 Tools

json formatterjson validatorjson beautifier

JSON Formatter

Format, minify, and validate JSON payloads without sending them to a server.

json escapejson unescapeescape json string

JSON Escape Unescape

Escape and unescape JSON string content for logs, fixtures, and embedded payloads.

base64 encoderbase64 decoderdecode base64

Base64 Encoder Decoder

Encode, decode, and inspect Base64, Base64URL, image data URLs, JSON payloads, and JWT segments locally in the browser.

yaml to jsonjson to yamlyaml json converter

YAML JSON Converter

Convert YAML to JSON and JSON to YAML for config and API workflows.

yaml validatorvalidate yamlyaml checker

YAML Validator

Validate YAML syntax, format YAML, and inspect Docker Compose services for config, CI, and documentation files.

env parserdotenv validator.env validator

ENV Parser Validator

Parse .env files, detect duplicate or invalid variables, and preview JSON output before copying config.

xml formatterxml beautifierxml minifier

XML Formatter

Format and minify XML strings in the browser.

csv to jsonjson to csvcsv json converter

CSV JSON Converter

Convert CSV rows to JSON arrays, JSON arrays back to CSV, and clean messy spreadsheet exports.

json schema validatorvalidate json schemajson schema online

JSON Schema Validator

Validate JSON values against simple JSON Schema object rules.

jsonpath testerjson path evaluatorjson path extractor

JSONPath Tester

Evaluate JSONPath selectors, wildcards, and recursive key searches against JSON payloads.

Security

4 Tools

jwt decoderjwt token decoderdecode jwt

JWT Decoder

Decode JWT header and payload segments locally for quick inspection.

hash generatorsha256 generatormd5 generator

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512, and HMAC signatures locally.

password generatorstrong passwordrandom password

Password Generator

Generate strong random passwords or memorable passphrases with configurable security settings.