Complete directory

All 114 browser tools

Search Base64, text, developer, generator, converter and image conversion utilities. Every tool processes its input locally and remains available through the offline PWA.

114 tools shown

Text tools

27 tools

Word & Character Counter

Count words, characters, sentences, paragraphs, lines and reading time live.

Text Case Converter

Switch text between upper, lower, title, sentence, camel, snake and kebab case.

Plain Text Formatter

Clean uneven spacing, tabs, blank lines and line endings with precise controls.

Remove Duplicate Lines

Deduplicate line-based lists with case, trimming and first-or-last controls.

Sort Lines & Lists

Sort lines alphabetically, naturally, by length or in secure random order.

Find & Replace Text

Replace text literally or with regular expressions, including case controls.

URL Slug Generator

Turn titles into clean, readable URL slugs with hyphens or underscores.

Reverse Text

Reverse Unicode characters, word order or complete lines without changing the source.

Add Line Numbers

Prefix every line with configurable numbering, padding and separators.

Text Repeater

Repeat text up to 1,000 times with a line, space or custom separator.

Remove Line Breaks

Join multi-line text using spaces, no separator or a custom replacement.

Email Extractor

Find email-like addresses in pasted text, remove duplicates and optionally sort them.

URL Extractor

Find HTTP and HTTPS links, remove duplicate matches and sort the list.

Number Extractor

Pull signed integers and decimal-like values from mixed text.

Character Frequency Analyzer

Count characters or words and rank them by occurrence and percentage.

Text Diff Checker

Compare two texts line by line and mark additions, removals and unchanged rows.

ROT13 Encoder & Decoder

Apply the reversible 13-position Latin-letter substitution.

Caesar Cipher

Shift Latin letters by a chosen positive or negative amount.

Morse Code Translator

Translate Latin letters, digits and common punctuation to or from Morse code.

Whitespace Cleaner

Trim lines, collapse repeated spaces and normalize tabs without changing the original text.

Remove Empty Lines

Delete blank or whitespace-only lines and optionally collapse repeated empty rows.

Add Prefix or Suffix to Lines

Add configurable text before or after every line, with optional empty-line skipping.

Join Lines with a Delimiter

Join one-value-per-line text using commas, spaces, pipes or a custom delimiter.

Split Text into Lines

Split text by a delimiter, regular expression or fixed character length.

Shuffle Lines

Randomize line order with browser cryptographic randomness and optional duplicate removal.

Hashtag Extractor

Find hashtags in pasted text, remove duplicates and optionally normalize case.

Domain Extractor

Collect normalized hostnames from URLs, email addresses and domain-like text.

Developer tools

47 tools

Base64 Encoder & Decoder

Encode or decode UTF-8 Base64 with optional encrypted history and JSON backup.

JSON Formatter & Validator

Validate, beautify, minify and optionally sort JSON object keys.

URL Encoder & Decoder

Percent-encode query values or full URLs and safely decode them again.

HTML Escape & Unescape

Convert reserved HTML characters to entities or entities back to text.

JWT Decoder

Decode JSON Web Token headers and payloads without transmitting the token.

SHA Hash Generator

Generate SHA-256, SHA-384, SHA-512 or legacy SHA-1 for text and files.

CSV to JSON Converter

Parse quoted CSV rows and convert headers into JSON object properties.

JSON to CSV Converter

Convert an array of JSON objects to quoted CSV with a union of all keys.

XML Formatter & Validator

Validate XML with the browser parser and indent nested elements for reading.

SQL Formatter

Break common SQL clauses and comma-separated lists into readable lines.

CSS Minifier

Remove comments and unnecessary whitespace while protecting quoted strings.

HTML Minifier

Remove ordinary comments and inter-tag whitespace while protecting sensitive blocks.

Regular Expression Tester

Run JavaScript regular expressions and inspect indexes, captures and named groups.

URL Parser

Split an absolute URL into protocol, host, port, path, query and fragment.

Query String Parser

Convert query parameters to JSON or build an encoded query from JSON.

JSON String Escape & Unescape

Escape quotes, backslashes and control characters for a JSON string value.

UUID Validator

Validate canonical UUIDs and identify versions, RFC variants and the nil value.

Base64URL Encoder & Decoder

Encode UTF-8 as URL-safe Base64 or decode unpadded Base64URL values.

Unicode Escape & Unescape

Convert text to JavaScript-style Unicode escapes or decode escape sequences back to text.

Regular Expression Escaper

Escape text for literal use in a regular expression and optionally wrap it with anchors.

Hex, Bytes & Text Converter

Convert UTF-8 text to hexadecimal bytes or decode valid hexadecimal back to text.

JSON Lines Formatter

Validate, pretty-print or compact one JSON value per line.

JSON Path Extractor

Read nested JSON values using simple dot and bracket paths such as users[0].name.

Semantic JSON Compare

Compare JSON values by structure while optionally ignoring object-key order.

CSS Formatter

Indent CSS rules and declarations while protecting comments and quoted strings.

JavaScript Minifier

Remove comments and unnecessary whitespace from small JavaScript snippets conservatively.

HTTP Header Parser

Parse raw HTTP headers into a structured table or JSON object.

URL Query String Builder

Build a URL from a base address and editable key-value query parameters.

Markdown Preview

Preview common Markdown locally and export sanitized HTML for simple documents.

YAML Formatter & Validator

Validate, normalize and format common YAML documents locally in your browser.

JSON ↔ YAML Converter

Convert common JSON and YAML structures in either direction without uploads.

TOML Formatter & Validator

Validate and normalize common TOML tables, arrays and primitive values locally.

JSON Schema Validator

Validate JSON against a practical local subset of JSON Schema keywords.

XML ↔ JSON Converter

Convert XML documents and practical JSON object structures in either direction locally.

HTML Formatter & Beautifier

Beautify or minify HTML with configurable indentation and local processing.

JavaScript Formatter & Beautifier

Beautify or compact JavaScript with string, template and comment awareness.

GraphQL Formatter

Format GraphQL queries, mutations, fragments and variables with consistent indentation.

Cron Expression Parser

Explain five-field cron expressions and calculate upcoming local run times.

GZip Compress & Decompress

Compress UTF-8 text to a Base64 GZip payload or decompress it locally.

Color Contrast Checker

Calculate WCAG contrast ratios and preview normal and large text locally.

CSS Gradient Generator

Build linear or radial gradients and copy the generated CSS declaration.

CSS Box Shadow Generator

Tune offsets, blur, spread, color and inset state with a live CSS preview.

CSS Clamp Calculator

Generate a fluid clamp() expression between viewport and value limits.

Robots.txt Generator

Build common robots.txt directives and sitemap declarations with a preview.

Meta Tags & Open Graph Generator

Generate title, description, canonical, Open Graph and Twitter card markup.

Content Security Policy Builder

Build common CSP directives and copy a header or meta-policy value.

HTTP Status Code Lookup

Search common HTTP response codes by number, phrase or category.

Generators

16 tools

UUID v4 Generator

Create up to 100 random version 4 UUIDs using secure browser randomness.

Secure Password Generator

Create strong random passwords with length and character-set controls.

Lorem Ipsum Generator

Generate configurable paragraphs and sentences of familiar placeholder copy.

Random Number Generator

Generate integer or fixed-decimal values across a configurable range.

Random String Generator

Create random strings from selected or custom character sets.

Passphrase Generator

Combine random words with separators, capitalization and an optional number.

Username Generator

Combine local adjective and noun lists with separators and optional numbers.

Dice Roller

Roll expressions such as 3d6+2 with secure randomness and detailed results.

ULID Generator

Create 26-character time-sortable identifiers with secure random components.

API Key Generator

Generate cryptographically random hexadecimal, Base64URL or custom-alphabet API keys.

Nonce Generator

Generate one-time random nonce values for CSP, OAuth and application tests.

MAC Address Generator

Generate random locally administered unicast MAC addresses for testing.

Random Date Generator

Generate random dates between two bounds with UTC or local output formats.

Random Choice Picker

Choose one or more items from a list with secure local randomness and optional no-replacement mode.

Color Palette Generator

Generate related HSL color palettes from a base color and copy CSS variables.

QR Code Generator & Reader

Generate downloadable QR codes and decode QR images locally when supported.

Converters

22 tools

Unix Timestamp Converter

Convert Unix seconds or milliseconds to ISO, UTC and local dates, or back again.

Text to Binary Converter

Convert Unicode text to 8-bit UTF-8 binary bytes and decode valid binary again.

Number Base Converter

Convert arbitrarily large integers between bases 2 and 36.

Roman Numeral Converter

Convert canonical Roman numerals to integers and numbers back to Roman form.

Temperature Converter

Convert values among Celsius, Fahrenheit and Kelvin instantly.

Length Converter

Convert millimeters, meters, kilometers, inches, feet, yards and miles.

Weight & Mass Converter

Convert milligrams, grams, kilograms, ounces, pounds, stone and tonnes.

Data Size Converter

Convert decimal and binary byte units without confusing MB and MiB.

Speed Converter

Convert meters per second, km/h, mph, knots and feet per second.

Percentage Calculator

Calculate a percentage of a value, a ratio percentage or percentage change.

Date Difference Calculator

Measure elapsed time between two local dates in multiple units.

HEX, RGB & HSL Color Converter

Convert a HEX or RGB color to equivalent HEX, RGB and HSL values.

Time Unit Converter

Convert nanoseconds, microseconds, milliseconds, seconds, minutes, hours, days and weeks.

Area Converter

Convert metric and imperial area units including acres and hectares.

Volume Converter

Convert metric volumes, cubic units and common US liquid measures.

Pressure Converter

Convert pascals, kilopascals, megapascals, bar, PSI, atmospheres and torr.

Energy Converter

Convert joules, kilojoules, watt-hours, kilowatt-hours, calories and BTU.

Power Converter

Convert watts, kilowatts, megawatts, mechanical horsepower and BTU per hour.

Angle Converter

Convert degrees, radians, gradians, turns, arcminutes and arcseconds.

Frequency Converter

Convert frequency units and revolutions per minute.

Fuel Economy Converter

Convert liters per 100 km, kilometers per liter and US or imperial MPG.

Coordinate Format Converter

Convert latitude and longitude between decimal degrees and DMS notation.

Image tools

2 tools

Image to Base64 Converter

Read a local image as a Base64 data URL for CSS, HTML or test fixtures.

Base64 to Image Converter

Turn an image data URL or raw Base64 into a local preview and downloadable file.

One private directory for everyday browser utilities

This catalog keeps Base64 encoding and decoding together with text cleanup, developer data formatting, secure generators, measurement converters and local Base64 image conversion. Use the search field or category filters to reach a focused utility without scrolling through the home page.

Available online and offline

No tool input is sent to a conversion API. Once the PWA has cached the catalog, every listed page and its supporting code can open without a network connection. Dedicated URLs, descriptive articles and structured data also make individual utilities easy to bookmark and discover.