Documentation
Comprehensive guide to all tools available on the bookmarked.tools platform. Each tool is designed to be fast, secure, and easy to use with no sign-ups or limitations.
Text
(26 tools)Text processing and conversion tools
Markdown to HTML Converter
/markdown-to-htmlConvert markdown syntax to valid HTML in real-time
Shuffle Words
/shuffle-wordsRandomly shuffle the order of words in your text
Character Count
/character-countReal-time text analysis tool counting characters, words, lines, and bytes
Convert Words to Numbers
/convert-words-to-numbersConvert English number words to numeric values
Convert Numbers to Words
/convert-numbers-to-wordsConvert signed whole numbers to English words
Find and Replace Text
/find-and-replace-textFind and replace text with plain text or regex support, case sensitivity options, and real-time preview
Convert Text to ASCII Art
/convert-text-to-ascii-artAdd character spacing to uppercase text for a simple ASCII-style banner
HTML to Markdown
/html-to-markdownConvert HTML markup to Markdown format
Split a String
/split-a-stringPowerful string splitting tool with multiple delimiters, patterns, and output formats
Stringify JSON
/stringify-jsonConvert JSON objects and arrays into compact single-line strings
Sort CSV Data
/sort-csv-dataSort CSV data by any column in ascending or descending order
Extract CSV Column
/extract-csv-columnExtract a specific column from CSV data with multiple output formats
Reverse Text
/reverse-textReverse characters, word order, or line order in text
Shuffle Letters
/shuffle-lettersRandomly reorder ASCII letters and digits within each word
Shuffle Lines
/shuffle-linesRandomly shuffle the order of lines in text
Slugify String
/slugify-stringTurn text into a lowercase ASCII slug with hyphens or underscores
Convert ASCII Art to Image
/convert-ascii-art-to-imageRender ASCII art as a visual PNG image with customizable fonts and colors
Repeat a String
/repeat-a-stringRepeat a string multiple times with optional separators
CSS Inliner for Email
/css-inliner-for-emailConvert CSS styles to inline HTML attributes for email templates
Add Commas to Integers
/add-commas-to-integersAdd thousand separators to numbers
Generate Zalgo Text
/generate-zalgo-textGenerate creepy Zalgo (corrupted) text
Lorem Ipsum Generator
/lorem-ipsum-generatorGenerate up to 100 paragraphs of Lorem Ipsum placeholder text
Batch Text Replacer
/batch-text-replacerReplace multiple text patterns at once with support for regex and case sensitivity
Convert Text to Unicode Font
/convert-text-to-unicode-fontConvert text to Unicode font styles
Remove Unicode Font from Text
/remove-unicode-font-from-textRemove Unicode font styling from text
Utility
(33 tools)Utility tools for productivity and security
Password Generator
/password-generatorGenerate secure random passwords with customizable options
Anthropic Token Counter
/anthropic-token-counterCount tokens for all Claude models and estimate API costs
OpenAI Token Counter
/openai-token-counterCount text tokens and estimate cost for listed OpenAI model profiles
QR Code Generator
/qrcode-generatorGenerate a QR code for text, URLs, contact details, or Wi-Fi
Deepseek Token Counter
/deepseek-token-counterCount tokens and estimate costs for Deepseek models
Llama Token Counter
/llama-token-counterCount tokens and estimate costs for Llama models
Pick Random Item
/pick-random-itemRandomly select one or more items from a list
Sort a List
/sort-a-listSort items alphabetically, numerically, or in reverse order
Find Unique List Items
/find-unique-list-itemsFind unique items and detect duplicates in a list
Generate Random Number
/generate-random-numberGenerate random numbers with customizable range and options
MAC Address Generator
/mac-address-generatorGenerate random MAC addresses for network testing and development
RSA Key Pair Generator
/rsa-key-pair-generatorGenerate RSA public and private key pairs for encryption and digital signatures
Sort Numbers
/sort-numbersSort numbers in ascending or descending order
OpenAI Cost Calculator
/openai-cost-calculatorCalculate OpenAI API costs based on token usage and model selection
Find Repeating List Items
/find-repeating-list-itemsAnalyze lists to find and count repeating items with frequency analysis
Generate Number Sequence
/generate-number-sequenceGenerate arithmetic sequences of numbers
Increment Integer Digits
/increment-integer-digitsIncrement each digit in integers individually
HAR File Viewer
/har-file-viewerView and analyze HTTP Archive (HAR) files with detailed request/response data
MAC Address Lookup
/mac-address-lookupLook up the IEEE vendor (OUI) for a MAC address
Zstandard Compression
/zstandard-compressionCompress and decompress text data using Zstandard-like compression
Calculate Number Sum
/calculate-number-sumPaste a list of numbers and get the sum, count, and average
Enumerate Integers
/enumerate-integersGenerate a sequence of integers with custom start, stop, and step
Generate Pi Digits
/generate-pi-digitsGenerate any number of digits of π with high precision
Generate Look and Say Sequence
/generate-look-and-say-sequenceGenerate Conway's look-and-say sequence from any digit seed
Draw Pascal's Triangle
/draw-pascals-triangleGenerate Pascal's triangle with binomial coefficients for any row count
Generate Random Matrix
/generate-random-matrixGenerate a random matrix with custom size and value range
Visualize an L-System
/visualize-l-systemExpand and draw Lindenmayer systems with turtle graphics
Generate a Sierpinski Triangle
/generate-sierpinski-triangleDraw the Sierpinski triangle fractal at a chosen recursion depth
Generate a Hilbert Curve
/generate-hilbert-curveDraw a Hilbert space-filling curve for a chosen order
WAV to MP3 Converter
/wav-to-mp3-converterConvert WAV audio to 320kbps MP3 in the browser
MP3 to WAV Converter
/mp3-to-wav-converterConvert MP3 audio to WAV for editing or lossless workflows
Color
(2 tools)Color conversion and generation
Image
(34 tools)Image manipulation and conversion
WebP to PNG Converter
/webp-to-png-converterConvert WebP images to PNG format with transparency support
PNG to WebP Converter
/png-to-webpConvert PNG to WebP for better compression and smaller files
Resize Image
/resize-imageResize an image to pixel dimensions and export PNG, JPEG, or WebP
Extract GIF Frames
/extract-gif-framesExtract individual frames from animated GIFs and arrange them into a single PNG
Change GIF Speed
/change-gif-speedAdjust the playback speed of animated GIF files
Rotate Image
/rotate-imageRotate images (PNG, JPG, WebP, and more) by any angle in degrees or radians with automatic canvas expansion
Pixelate a JPG
/pixelate-jpgApply pixelation effect to JPG images for privacy or artistic purposes
Blur Image
/blur-imageBlur an entire image or a rectangular region in your browser
Change JPG Quality
/change-jpg-qualityAdjust JPEG image quality to optimize file size and visual fidelity
Convert Text to Image
/convert-text-to-imageTransform text into customizable images with fonts, colors, and effects
Change PNG Color
/change-png-colorReplace specific colors in PNG images with new colors instantly
Create Grayscale JPG
/create-grayscale-jpgConvert color JPG images to grayscale (black and white) with adjustable quality
Create Transparent PNG
/create-transparent-pngMake PNG backgrounds transparent by removing solid colors
Add JPG Border
/add-jpg-borderAdd colored borders or frames around JPEG images
Create Transparent JPG
/create-transparent-jpgRemove background colors from images to create transparency
Reverse GIF
/reverse-gifReverse the animation sequence of a GIF, playing frames in backward order
Remove GIF Background
/remove-gif-backgroundRemove background colors from animated GIFs to create transparency
Add Text to GIF
/add-text-to-gifAdd customizable text overlays to animated GIF images
Convert CSV to Text Columns
/convert-csv-to-textConvert CSV data to text columns
Convert UTF8 to Binary
/convert-utf8-to-binaryEncode text as UTF-8 bytes shown in hexadecimal and binary
Convert Binary to UTF8
/convert-binary-to-utf8Convert binary representation back to UTF8 text
Convert Unicode to UTF8
/convert-unicode-to-utf8Convert Unicode code points to UTF8 encoded bytes
Create Transparent WebP
/create-transparent-webpMake WebP backgrounds transparent by removing solid colors
Replace WebP Colors
/replace-webp-colorsReplace colors in WebP images
SVG Viewer
/svg-viewerView, preview, and analyze SVG files with source code display
SVG Placeholder Generator
/svg-placeholder-generatorGenerate customizable SVG placeholder images with text and colors
WebP Converter
/webp-converterConvert images between WebP, PNG, and JPG formats with quality control
Convert Hex to Image
/convert-hex-to-imageConvert hexadecimal or Base64 data into an image file
Sharpen Image
/sharpen-imageApply sharpening filter to enhance image clarity
JPG to PNG Converter
/jpg-to-png-converterConvert JPG and JPEG photos to PNG without uploading them
PNG to JPG Converter
/png-to-jpg-converterConvert PNG images to JPG with quality control, in the browser
SVG to PNG Converter
/svg-to-png-converterRasterize SVG vector graphics to PNG in the browser
Data
(30 tools)Data conversion and formatting
UUID Generator
/uuid-generatorGenerate up to 1,000 random UUID v4 identifiers
JSON to YAML
/json-to-yamlConvert JSON data format to YAML with formatting options
Prettify JSON
/prettify-jsonFormat and beautify minified JSON with flexible indentation options
JSON to XML
/json-to-xmlConvert JSON values to XML with a configurable root element
XML to JSON
/xml-to-jsonConvert XML to JSON with attributes, repeated elements, and indentation
YAML to TOML
/yaml-to-tomlConvert YAML configuration files to TOML format
Convert CSV to JSON
/convert-csv-to-jsonTransform CSV data into JSON format with customizable options
Convert Hex to RGB
/convert-hex-to-rgbConvert hexadecimal color codes to RGB/RGBA format with color preview
Date Time Converter
/date-time-converterConvert between different date/time formats and timezones
Faker
/fakerGenerate realistic fake data for testing - names, emails, addresses, and more
OG Meta Generator
/og-meta-generatorGenerate Open Graph and Twitter Card meta tags for social media
Spoof Unicode Text
/spoof-unicode-textReplace text with Unicode lookalikes for fun effects
TOML Formatter
/toml-formatterFormat and validate TOML configuration files with proper indentation
TOML to JSON
/toml-to-jsonConvert simple TOML configuration entries to JSON with a limited parser
Count Binary Ones
/count-binary-onesCount the number of 1 bits in binary representation
Reverse Integer Digits
/reverse-integer-digitsReverse the digits of an integer
Draw Digital Clock
/draw-digital-clockDraw digital clock display showing current time
Count Binary Zeros
/count-binary-zerosCount zero bits in decimal, binary, or hexadecimal input
Invert Binary Bits
/invert-binary-bitsFlip all bits in a binary number (0→1, 1→0)
Shuffle Binary Bits
/shuffle-binary-bitsRandomly reorder the bits in a non-negative number
Convert Binary to Negabinary
/convert-binary-to-negabinaryConvert numbers to negabinary (base -2) representation
Generate Integer Pairs
/generate-integer-pairsGenerate random pairs of integers for testing or coordinates
Calculate Average Time
/calculate-average-timeAverage a list of durations in HH:MM:SS or MM:SS
Convert Dog Age to Human Years
/convert-dog-age-to-human-yearsConvert dog age to equivalent human years
Draw Memento Mori Calendar
/draw-memento-mori-calendarVisualize your life as weeks in a memento mori calendar
Code
(31 tools)Developer utilities and converters
JSON Formatter
/json-formatterFormat and validate JSON data with syntax highlighting
Minify JSON
/minify-jsonCompress JSON by removing all unnecessary whitespace
Base64 Encode
/base64-encodeConvert plain text to base64 encoded format instantly
Dockerfile Linter
/dockerfile-linterCheck Dockerfiles with basic syntax and best-practice heuristics
Base64 Decode
/base64-decodeDecode standard Base64 text as UTF-8 in your browser
URL Encoder/Decoder
/url-encoder-decoderEncode and decode URLs with component or full URL support
Regex Tester
/regex-testerTest regex patterns with all JavaScript flags and visual highlighting
JWT Parser
/jwt-parserDecode and parse JSON Web Tokens to view header, payload, and signature
Diff Checker
/diff-checkerCompare two text inputs line by line with highlighted changes
cURL to JS Fetch
/curl-to-js-fetchConvert basic cURL requests to JavaScript Fetch code
Image to Base64
/image-to-base64Convert image files to Base64 encoding
SQL Minifier
/sql-minifierMinify SQL queries by removing unnecessary whitespace
Analyze JSON
/analyze-jsonAnalyze JSON structure and get detailed statistics about your data
Convert Base64 to Image
/convert-base64-to-imageDecode Base64 strings back to viewable image files
Change CSV Delimiter
/change-csv-delimiterConvert CSV data between different delimiters with proper quote handling
Obfuscate JSON
/obfuscate-jsonReplace JSON property names with short identifiers to reduce size and obfuscate structure
Query Params to JSON
/query-params-to-jsonConvert URL query parameters to JSON format
CSS Units Converter
/css-units-converterConvert between CSS units like px, em, rem, %, vw, vh, and more
Chmod Calculator
/chmod-calculatorInteractive chmod permission calculator for Unix/Linux file permissions
Cron Tester
/cron-testerValidate and test cron expressions with human-readable descriptions
Convert Decimal to ASCII
/convert-decimal-to-asciiConvert decimal numbers to ASCII/Unicode characters instantly
Convert Hex to Text
/convert-hex-to-textConvert hexadecimal strings to readable text instantly
Env to Netlify TOML
/env-to-netlify-tomlConvert .env files to Netlify TOML format
Email Validator
/email-validatorValidate email addresses and check format compliance with RFC standards
Convert UTF8 to Hex
/convert-utf8-to-hexEncode UTF-8 text as hexadecimal bytes
Convert Hex to UTF8
/convert-hex-to-utf8Convert hexadecimal representation back to UTF-8 text
Convert ASCII to Decimal
/convert-ascii-to-decimalConvert ASCII characters to their decimal (Unicode) values
Reverse Hex Digits
/reverse-hex-digitsReverse the digits of hexadecimal numbers
Convert Bytes to ASCII
/convert-bytes-to-asciiMap decimal or 0x byte values to single-byte characters
Convert IP to Hex
/convert-ip-to-hexConvert IPv4 addresses to hexadecimal
Can't find what you're looking for?
We're always adding new tools. Submit your idea and we'll consider it for the next release.
Submit Tool Idea