ToolsForWeb
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ToolsForWeb.com

Small, focused tools for everyday web work: network calculators, encoders and decoders, formatters and converters.

Subnet Calculator

Work out network, broadcast, host range and mask from any IPv4 CIDR.

IP Base Converter

Convert an IPv4 address between dotted-decimal, integer, hex and binary.

What Is My IP

Show the IP address your connection presents to our server, IPv4 or IPv6.

Base64 Encode / Decode

Encode text to Base64 or decode it back, with URL-safe and Unicode support.

URL Encode / Decode

Percent-encode or decode text for use in URLs and query strings.

JWT Decoder

Decode a JSON Web Token's header and payload without verifying the signature.

Password Generator

Generate a strong random password or passphrase, with its entropy in bits.

JWT Generator

Sign a JWT with HS256 in your browser — custom claims, expiry and iat.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 digests of text.

Hash Identifier

Identify the likely algorithm behind a hash from its format and length.

CVSS Calculator

Score a vulnerability with CVSS v3.1 or v4.0 base metrics, or decode a vector string.

JSON-LD Schema Generator

Build valid schema.org JSON-LD for Article, FAQ, Breadcrumb, Organization, LocalBusiness and Product.

JSON-LD Validator

Check schema.org JSON-LD for syntax errors and missing properties Google needs for rich results.

Meta Tag Generator

Generate the title, description, canonical, Open Graph and Twitter Card tags for a page's <head>.

SERP Snippet Preview

Preview how a page's title and description render in Google results, with pixel-width truncation.

UTM Link Builder

Add utm_source, utm_medium, utm_campaign and more to a URL for campaign tracking.

Sitemap URL Extractor

Fetch a sitemap and extract every URL in it as a clean list.

robots.txt Generator & Tester

Build a robots.txt file and test whether a URL is allowed, using Google's real matching rules.

JSON Formatter

Pretty-print, minify and validate JSON, with the line and column of any syntax error.

Regex Tester

Test a JavaScript regular expression against sample text with live match highlighting.

UUID Generator

Generate one or up to 100 random v4 UUIDs.

Cron Expression Parser

Explain a cron expression in plain English and show the next run times.

YAML / TOML Converter

Convert data between JSON, YAML and TOML, with line-and-column errors when input won't parse.

URL Parser

Break a URL into protocol, host, port, path, query parameters and fragment.

Lorem Ipsum Generator

Generate classic lorem ipsum filler text as paragraphs, sentences, words or list items.

JSON to TypeScript

Turn a JSON document into TypeScript interfaces, with optional fields and unions.

SQL Formatter

Pretty-print SQL with dialect-aware keywords, indent and case options.

HTML Entity Encoder / Decoder

Escape text to HTML entities or decode them back, with two escape levels.

Case Converter

Convert text between camelCase, snake_case, kebab-case, Title Case and more.

Word & Character Count

Count words, characters, sentences, paragraphs and estimated reading time.

Slugify

Turn any title into a clean, URL-safe slug.

Text Diff

Compare two blocks of text and highlight what changed.

Markdown Preview

Write Markdown with a live preview, side by side or stacked.

Color Converter

Convert a color between HEX, RGB, HSL and OKLCH.

Unit Converter

Convert length, mass, temperature, data size and more.

Timestamp Converter

Convert between Unix timestamps and human-readable dates in any timezone.

CSV / JSON Converter

Convert CSV to JSON or JSON to CSV, with delimiter auto-detection and correct quoting.

Date Difference

Measure the span between two dates in days, weeks, months, years and business days.

Image Compressor

Shrink a photo or screenshot in your browser — quality, resize and format.

QR Code Generator

Turn text, a WiFi network or a contact card into a downloadable QR code.