All tools
90 tools so far, arriving kit by kit. Each one runs in your browser and asks nothing of you.
Image Toolkit
- compress-image
Compress Image
Re-encode a JPEG or WebP image at a smaller size. - image-to-base64
Image to Base64
Encode an image as a base64 data URI. - resize-image
Resize Image
Resize an image to exact dimensions. - convert-image-format
Convert Image Format
Convert between PNG, JPEG, and WebP. - rotate-flip-image
Rotate & Flip Image
Rotate an image 90, 180, or 270 degrees, and flip it. - crop-image
Crop Image
Crop an image to a rectangular region. - round-image-corners
Round Image Corners
Round the corners of an image, with a transparent background. - add-border-image
Add Border to Image
Add a solid-color border around an image. - color-picker
Color Picker
Click anywhere on an image to sample its color.
PDF Toolkit
- merge-pdf
Merge PDF
Combine multiple PDFs into one, in the order you add them. - split-pdf
Split PDF
Extract a page range into a new PDF. - delete-pages
Delete Pages
Remove specific pages from a PDF. - reorder-pages
Reorder Pages
Rearrange a PDF's pages into a new order. - rotate-pages
Rotate Pages
Rotate specific pages 90, 180, or 270 degrees. - images-to-pdf
Images to PDF
Combine JPG and PNG images into one PDF. - add-page-numbers
Add Page Numbers
Stamp page numbers onto every page. - watermark-pdf
Watermark PDF
Add a diagonal text watermark to every page. - compress-pdf
Compress PDF
Re-optimize a PDF's structure to reduce its file size.
Developer Utilities
- json-formatter
JSON Formatter
Pretty-print, minify, and catch syntax errors with line numbers. - xml-formatter
XML Formatter
Indent and tidy XML, catching mismatched or unclosed tags. - base64-encoder
Base64 Encoder / Decoder
Encode and decode base64 text, including a URL-safe variant. - url-encoder
URL Encoder / Decoder
Percent-encode or decode a URL component or a whole URI. - jwt-decoder
JWT Decoder
Read a token's header, payload, and expiry. Decoding only, never sent. - uuid-generator
UUID Generator
Generate v4 and v7 UUIDs, one or a thousand at a time. - sha-256-hash-generator
SHA-256 Hash Generator
Hash text and compare it against an expected digest. - regex-tester
Regex Tester
Live matches and capture groups for a regular expression. - timestamp-converter
Timestamp Converter
Unix seconds or milliseconds to a readable date, in any time zone.
Writing & SEO Tools
- serp-preview
SERP / Meta Tag Preview
Preview how a page looks in Google search results. - og-preview
Open Graph / Social Card Preview
Preview how a page looks when shared on social media. - keyword-density-analyzer
Keyword Density Analyzer
Check how often a keyword appears in a block of text. - readability-checker
Readability Score Checker
Estimate how easy a block of text is to read. - robots-txt-generator
Robots.txt Generator
Build a robots.txt from user-agent rules and a sitemap URL. - sitemap-generator
XML Sitemap Generator
Build an XML sitemap from a list of URLs. - faq-schema-generator
FAQ Schema Generator
Build FAQPage JSON-LD structured data from question and answer pairs. - utm-builder
UTM Campaign URL Builder
Build a tracked campaign URL from a base link and UTM parameters. - headline-capitalization
Headline Capitalization Checker
Convert a headline to AP-style title case.
Finance Calculators
- percentage-calculator
Percentage Calculator
Find a percentage of a number, what percent one number is of another, or percent change. - mortgage-calculator
Mortgage Calculator
Estimate your monthly mortgage payment. - loan-calculator
Loan Payment Calculator
Estimate the monthly payment on any fixed-rate loan. - compound-interest-calculator
Compound Interest Calculator
Project the future value of savings with monthly contributions. - simple-interest-calculator
Simple Interest Calculator
Calculate non-compounding simple interest. - savings-goal-calculator
Savings Goal Calculator
Find the monthly contribution needed to reach a savings target. - margin-calculator
Margin & Markup Calculator
Calculate profit margin and markup from cost and revenue. - tip-calculator
Tip Calculator
Calculate a tip and split the bill. - roi-calculator
ROI Calculator
Calculate total and annualized return on investment.
Productivity Tools
- qr-code-generator
QR Code Generator
Generate a scannable QR code from text or a URL. - barcode-generator
Barcode Generator
Generate a CODE128 barcode from text. - invoice-generator
Invoice Generator
Build a simple invoice and export it as a PDF. - countdown-timer
Countdown Timer
Count down to a specific date and time. - duration-calculator
Time Duration Calculator
Add or subtract two time durations. - password-generator
Random Password Generator
Generate a strong random password. - random-number-generator
Random Number Generator
Generate one or more random numbers in a range. - meeting-cost-calculator
Meeting Cost Calculator
Estimate the real cost of a meeting. - name-team-picker
Random Name/Team Picker
Pick a random winner or split a list into teams.
Social Media Tools
- youtube-thumbnail-downloader
YouTube Thumbnail Downloader
Download a YouTube video's thumbnail in every available resolution. - video-frame-grabber
Video Frame Thumbnail Grabber
Grab a still frame from a video file as a thumbnail. - social-image-size-checker
Social Media Image Size Checker
Check an image against a platform's recommended size. - social-image-cropper
Social Media Image Cropper
Crop an image to a platform's recommended aspect ratio. - aspect-ratio-calculator
Aspect Ratio Calculator
Reduce a ratio or solve for a missing dimension. - post-character-counter
Post Character Counter
Count caption characters against a platform limit. - hashtag-mention-extractor
Hashtag & Mention Extractor
Extract and count hashtags and mentions from a caption. - post-mockup-previewer
Social Post Mockup Previewer
Preview how a caption and image will look as a native post. - video-size-estimator
Video Upload Size Estimator
Estimate a video file size from bitrate and duration.
Text Utilities
- word-counter
Word & Character Counter
Count words, characters, sentences, and paragraphs, with an estimated reading time. - case-converter
Case Converter
Convert text between UPPERCASE, lowercase, Title Case, camelCase, and more. - text-diff
Text Diff / Compare
Compare two blocks of text and see what changed, line by line. - duplicate-line-remover
Duplicate Line Remover
Remove duplicate lines from a block of text, keeping the first occurrence. - whitespace-cleaner
Whitespace Cleaner
Collapse extra spaces, trim lines, and tidy up blank lines. - find-replace
Find & Replace
Find and replace text, with optional regex and case sensitivity. - text-reverser-sorter
Text Reverser & Sorter
Reverse characters, words, or lines, or sort lines alphabetically. - lorem-ipsum-generator
Lorem Ipsum Generator
Generate placeholder Lorem Ipsum text by words, sentences, or paragraphs. - slug-generator
Slug Generator
Convert text into a URL-friendly slug.
International Tools
- timezone-converter
Time Zone Converter
Convert a date and time from one time zone to another. - date-difference-calculator
Date Difference Calculator
Find the number of days, months, and years between two dates. - age-calculator
Age Calculator
Calculate age in years, months, and days from a birth date. - date-add-subtract-calculator
Date Add/Subtract Calculator
Add or subtract days, weeks, months, or years from a date. - length-converter
Length Converter
Convert between metric and imperial length units. - weight-converter
Weight Converter
Convert between metric and imperial weight units. - temperature-converter
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin. - volume-converter
Volume Converter
Convert between US customary volume units. - speed-converter
Speed Converter
Convert between km/h, mph, m/s, and knots.
AI Companion Tools
- prompt-token-counter
Prompt Token Counter
Count real tokens in a prompt for a specific model. - ai-cost-context-calculator
AI Cost & Context Calculator
Estimate API cost and context-window usage for a prompt. - prompt-template-filler
Prompt Template Filler
Fill {{variables}} in a reusable prompt template. - system-prompt-builder
System Prompt Builder
Assemble a system prompt from role, tone, and constraints. - sensitive-data-scanner
Sensitive Data Scanner
Check text for possible sensitive data before sharing it with an AI tool. - code-block-extractor
Markdown Code Block Extractor
Pull fenced code blocks out of a markdown response. - ai-image-prompt-builder
AI Image Prompt Builder
Assemble a structured prompt for an image-generation model. - prompt-json-escaper
Prompt JSON Escaper
Escape a prompt for embedding in JSON or code, or reverse it. - chat-transcript-formatter
Chat Transcript Formatter
Turn a raw pasted chat log into a clean markdown transcript.
Advertisement