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Focused utilities for text, files, images, and calculations — the small jobs that should take seconds, not a new account or subscription.
Text & Writing
Character Counter
Check text limits, characters, words, reading time, and frequency.
PopularAvailableLocalText Diff Checker
Compare two texts or code files and highlight differences line by line or character by character.
AvailableLocalCase Converter
Convert text to uppercase, lowercase, title case, and more.
AvailableLocalText Cleaner & Line Tools
Trim, dedupe, sort, replace, shuffle, and remove accents.
AvailableLocalMarkdown Previewer
Write Markdown and see a safe formatted preview.
AvailableLocalLorem Ipsum Generator
Generate Lorem Ipsum with basic and advanced controls.
AvailableLocalUnicode Inspector
Reveal code points, invisible characters, and normalization.
AvailableLocalReadability Calculator
Check the Flesch Reading Ease score of English text.
AvailableLocalEmail & URL Extractor
Extract emails and links from text or files with deduplication and domain filters.
AvailableLocalList Comparator
Compare two lists to find common and unique items.
AvailableLocalMorse Code Converter
Translate text to Morse code and back, with browser playback and WAV download.
AvailableLocalText to Binary
Convert text to binary strings.
AvailableLocalWord Scrambler
Randomly scramble words in your text.
AvailableLocalABNT, APA & MLA Citation Generator
Generate formatted citations and bibliographies in ABNT, APA, and MLA styles.
Calculators
Percentage Calculator
Solve common percentage questions locally: what is X percent of Y, percentage change, final totals after increase or decrease, discount price plus savings, and adding or removing a tax rate.
AvailableLocalAge Calculator
Calculate exact age in years, months, and days.
AvailableLocalDate Difference & Deadline Calculator
Count days and business days, or add time to a date.
AvailableLocalRule of Three Calculator
Find the missing value in a direct proportion.
AvailableLocalAverage Calculator
Calculate simple mean, weighted average, median, and standard deviation.
AvailableLocalWork Hours Calculator
Calculate worked hours, break time, decimal hours, and daily timesheet balance.
AvailableLocalRunning Pace Calculator
Calculate running pace (min/km, min/mi), finish time, speed, and split tables.
AvailableLocalRecipe Scaler
Scale recipe ingredients up or down for any target number of servings.
AvailableLocalBMI Calculator
Calculate your Body Mass Index.
AvailableLocalFinal Grade Calculator
Find the score needed on a final exam or project.
AvailableLocalGPA Calculator
Calculate semester GPA and project cumulative targets.
AvailableLocalBMR & TDEE Calorie Calculator
Calculate your Basal Metabolic Rate, daily energy expenditure, and macronutrient targets.
AvailableLocalEthanol vs Gasoline Calculator
Calculate whether ethanol or gasoline is more economical and estimate driving range.
Developer Tools
UUID Generator
Generate standards-compliant UUID v4 and GUID identifiers individually or in bulk.
PopularAvailableLocalJSON, YAML & XML Formatter
Format, minify, and validate JSON and XML, and convert between JSON and YAML.
PopularAvailableLocalQR Code Generator & Reader
Create QR codes and read QR images locally.
PopularAvailableLocalBase64 Encoder/Decoder
Encode and decode text using Base64 locally.
PopularAvailableLocalURL Encoder/Decoder
Encode and decode URLs in separate tabs, with batch and recursive options.
PopularAvailableLocalUnix Timestamp Converter
Convert Unix timestamps (seconds and milliseconds) to dates and vice versa.
AvailableLocalHTML Entity Encoder/Decoder
Encode and decode HTML entities safely.
AvailableLocalRegex Tester
Test regular expressions and preview replacements.
AvailableLocalJWT Decoder
Decode JWT header and payload locally.
AvailableLocalCron Expression Generator & Validator
Build, validate, and decode 5-field cron expressions with next run times.
AvailableLocalJSON Diff Checker
Compare two JSON values and list changed paths.
AvailableLocalSQL Formatter
Format messy SQL into a more readable query.
AvailableLocalTest Data Generator
Generate fictional names, emails, UUIDs, dates, and numbers.
AvailableLocalJSON Schema Validator
Validate JSON data against a schema locally.
AvailableLocalJSONPath Tester
Test JSONPath expressions and view matched values.
AvailableLocalXPath Tester
Run XPath expressions against XML locally.
AvailableLocalJSON to TypeScript
Infer TypeScript interfaces from JSON samples.
AvailableLocalUnix chmod Permissions Calculator
Convert chmod numbers, rwx notation, and permission checkboxes.
AvailableLocalJavaScript Event Loop Simulator
Model the call stack and task queues step by step.
AvailableLocalCPF / CNPJ Generator & Validator
Generate and validate Brazilian CPF and CNPJ documents with Modulo 11 check digit verification.
Security
Password Generator
Generate strong passwords with browser cryptography.
PopularAvailableLocalHash Generator & File Checksum
Compute SHA-1, SHA-256, SHA-384, and SHA-512 hashes.
AvailableLocalEXIF Viewer and Remover
Inspect common photo metadata and download a clean copy.
AvailableLocalContent Security Policy Generator
Build a Content-Security-Policy header from a form.
AvailableLocalX.509 Certificate Decoder
Decode PEM or DER certificates locally in the browser.
AvailableLocalEmail Header Analyzer
Organize raw email headers into fields, route, and reported auth results.
AvailableServerPassword Breach Checker
Check if a password has appeared in a known data breach.
AvailableServerSecurity Headers Scanner
Scan a site's HTTP response headers and grade its security posture.
AvailableServerSSL/TLS Certificate Checker
Run a live TLS handshake against a domain and grade its certificate, chain, and protocol support.
AvailableLocalHMAC Generator
Generate HMAC hashes with a secret key.
AvailableLocalSSH Key Generator
Generate Ed25519, RSA, or ECDSA SSH key pairs with OpenSSH public key and fingerprints.
Images & Media
Image Compressor
Compress JPG, PNG, and WebP images by quality or exact target size in KB.
AvailableServerImage Resizer
Resize JPG, PNG, and WebP images to exact dimensions.
AvailableLocalFavicon Generator
Generate common favicon PNG sizes from an image.
AvailableServerImage Format Converter
Convert images between JPG, PNG, WebP, GIF, and BMP with quality and transparency controls.
AvailableLocalImage Rotator & Flipper
Rotate and flip an image before downloading it.
AvailableServerOCR — Image to Text
Extract text from an image.
AvailableServerVideo Compressor
Reduce video size by quality or a target file size.
AvailableServerHEIC to JPG Converter
Convert iPhone HEIC/HEIF photos to JPG.
AvailableServerMP4 to MP3 Converter
Extract video audio as a playable MP3.
AvailableServerAnimated GIF Compressor
Shrink animated GIFs while preserving motion.
AvailableServerBackground Remover
Remove photo backgrounds with clean, flexible output.
AvailableServerImage Upscaler & Enhancer
Enlarge images with profiles tuned for their content.
AvailableServerYouTube Thumbnail Downloader
Download every available YouTube thumbnail size from a video URL.
PDF & Files
PDF Merge, Split & Image to PDF
Merge, split, organize, and create PDFs.
AvailableLocalAdd Signature to PDF
Add a visual signature mark to a compatible PDF locally.
AvailableServerPDF Compressor
Shrink a PDF's file size with three compression levels.
AvailableServerWord to PDF Converter
Convert Word documents (.doc and .docx) into PDF with exact formatting.
AvailableServerMarkdown to PDF Converter
Turn Markdown text or .md files into a clean, downloadable PDF.
Converters
Color Converter
Convert HEX, RGB, HSL, and other color formats.
AvailableLocalUnit Converter
Convert length, weight, temperature, and common units.
AvailableLocalCSV to JSON Converter
Convert CSV to JSON and JSON back to CSV.
AvailableLocalHTML ↔ Markdown Converter
Convert basic HTML and Markdown in both directions.
AvailableLocalNumber Base Converter
Convert BIN, OCT, DEC, and HEX values precisely.
AvailableLocalResistor Color Code Decoder
Decode a resistor's color bands.
AvailableLocalSubtitle Converter & Synchronizer
Convert SRT, VTT, ASS/SSA, and SBV, and fix subtitles that run early or late.
Design Utilities
Contrast Checker
Check foreground and background contrast for UI work.
AvailableLocalAspect Ratio Calculator
Calculate proportional width or height for media and UI.
AvailableLocalCSS Generator
Generate clamp(), gradients, shadows, border radius, and grid CSS.
AvailableLocalSVG to Data URI Converter
Convert SVG markup to a CSS/HTML data URI and back.
AvailableLocalColor Palette Extractor
Extract dominant HEX and RGB colors from an image.
AvailableLocalSVG Optimizer
Remove extra SVG metadata, comments, and whitespace.
AvailableLocalCSS Specificity Calculator
Calculate and compare CSS selector specificity.
AvailableLocalTypographic Scale Calculator
Generate a font size scale from a base size and ratio.
AvailableLocalColor Blindness Simulator
Preview an image under common color vision deficiency modes.
AvailableLocalScreen PPI & Pixel Density Calculator
Calculate screen PPI, dot pitch, physical dimensions, and visual sharpness.
AvailableLocalEmail Signature Generator
Create a polished signature with live preview.
Productivity
Pomodoro Timer
Stay focused with configurable work and break intervals.
AvailableLocalRandom Picker & Number Generator
Pick, shuffle, or generate random numbers locally.
AvailableLocalTime Zone Converter
Convert a date and time across multiple time zones.
AvailableLocalBulk File Renamer
Rename many files at once with a pattern, then download them as a .zip.
AvailableLocalStopwatch
A simple and precise online stopwatch.
AvailableLocalHabit Streak Calculator
Calculate current streak, longest streak, and completion rate.
AvailableLocalPacking List Generator
Create a starter packing list for a trip.
AvailableLocalStudy Session Planner
Turn available time into study blocks and breaks.
AvailableLocalInvoice Due Date Calculator
Calculate invoice due and reminder dates.
AvailableLocalInvoice Number Generator
Generate padded invoice, quote, or order numbers.
Finance & Budgeting
Compound Interest Calculator
Simulate your investment growth with monthly contributions, interest compounding, and yearly tables.
AvailableLocalLoan Calculator
Estimate monthly payment and total interest.
AvailableLocalFuel Cost Calculator
Estimate trip fuel cost, liters, and split per passenger.
AvailableLocalMargin, Markup & ROI Calculator
Calculate profit margin, markup, or investment ROI from cost and price.
AvailableLocalBreak-Even Calculator
Calculate the units and revenue needed to break even.
AvailableLocalSalary to Hourly Rate Calculator
Convert monthly salary to hourly rate, or the other way around.
AvailableLocalFreelance Rate Calculator
Calculate minimum hourly, daily, and project rates.
AvailableLocalMarketplace Profit Calculator
Calculate unit net profit, profit margins, and break-even selling price.
AvailableLocalHandmade Product Pricing Calculator
Calculate craft production costs, retail and wholesale prices, and break-even points.
AvailableLocalSales Goal Calculator
Calculate required sales per day, week, and month to hit your revenue targets.
AvailableLocalSavings Goal Calculator
Calculate the monthly savings needed to reach a goal.
AvailableLocalElectricity Cost Calculator
Estimate kWh usage and electricity cost for one or more appliances.
AvailableLocalTip Split Calculator
Split a bill, tip, and service fee across a group.
AvailableLocalUnit Price Comparator
Compare two product sizes by price per unit.
AvailableLocalRent Split Calculator
Split rent and shared bills evenly or by room weight.
AvailableLocalEvent Budget Calculator
Estimate event cost and break-even price per guest.
AvailableLocalMeeting Cost Calculator
Estimate the hidden time cost of a meeting.
AvailableLocalCAGR Calculator
Calculate compound annual growth rate.
AvailableLocalAmazon FBA Fee Calculator
Estimate 2026 US fees, profit, margin, and ROI.
Home & DIY
3D Printing Cost Calculator
Calculate true 3D printing costs and sale prices including filament, energy, and labor.
AvailableLocalFlooring / Tile Calculator
Calculate tiles and boxes needed for a floor.
AvailableLocalVoltage Drop Calculator
Calculate voltage drop in a cable run.
AvailableLocalSolar PV Calculator
Size a solar panel system.
AvailableLocalBattery Runtime Calculator
Estimate how long a battery will last.
AvailableLocalConcrete Volume Calculator
Slab, beam, column, or footing, in m³, liters, or bags.
AvailableLocalPaint Coverage Calculator
Estimate liters, cans, and cost for painting.
AvailableLocalRoof Pitch Calculator
Convert roof slope and estimate rafters and surface area.
AvailableLocalDeck Materials Calculator
Estimate decking, framing lengths, and fasteners.
Network Tools
IP/CIDR Subnet Calculator
Calculate IPv4 network, mask, broadcast, and host range.
AvailableLocalTransfer Time Calculator
Estimate download, upload, or file transfer duration.
AvailableLocalBasic Auth Generator
Generate HTTP Basic Authentication headers.
AvailableLocalMAC Address Generator
Generate random MAC addresses.
AvailableLocalLoad Balancer Simulator
Simulate load balancing algorithms.
AvailableServerDNS Propagation Checker
Compare DNS records across regional views and global public resolvers.
SEO & Web Tools
Slug Generator
Turn titles and phrases into clean URL slugs.
AvailableLocalMeta Tags Generator
Create SEO, Open Graph, and Twitter meta tags.
AvailableLocalUTM Generator
Build campaign URLs with UTM parameters.
AvailableLocalrobots.txt Generator
Generate robots.txt rules and test a path.
AvailableServerSitemap XML Validator
Validate sitemap XML structure, URLs, and duplicates.
AvailableLocalUser-Agent Parser
Parse a User-Agent string into browser, OS, and device.
AvailableLocalHTTP Status Code Lookup
Look up what an HTTP status code means.
AvailableLocalMIME Type Lookup
Look up a file extension's MIME type, or the reverse.
AvailableLocalPunycode / IDN Converter
Convert domain names between Unicode and Punycode.
AvailableLocalURL Parser & Query Inspector
Parse and inspect URL components.
AvailableLocalKeyword Density Checker
Count keyword or phrase density in a draft.
AvailableServerYouTube Tags Extractor
Extract public video tags, hashtags, title, description, and SEO metadata.
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