Herramientas que funcionan en tu navegador

Image Compressor

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Browser-based compressor for JPG, PNG and WebP, by quality or to a target file size

Image Resizer

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Browser-based image resizer with pixel, percent and long-edge modes and social platform presets

HEIC to JPG Converter

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Browser-based HEIC to JPG converter for iPhone photos, batch ZIP download, no upload

QR Code Generator

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Create URL, Wi-Fi and contact QR codes and download them as PNG or SVG

EXIF Remover

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Browser tool that shows a photo's EXIF and GPS data and strips it (losslessly unless the photo needs turning upright)

WebP to JPG Converter

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Browser-based WebP to JPG converter with background color for transparency and batch ZIP

Photo Date Stamp

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Browser tool that reads photo dates and stamps them onto a corner of each image

Image to Base64

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Browser converter between images and Base64, data URIs, CSS and HTML snippets

Merge PDF

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Browser-based PDF merger with previews and drag-to-reorder, no upload

Split PDF

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Split a PDF by page ranges, every N pages or per page, with ZIP download, in the browser

Organize PDF

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Reorder, rotate and delete PDF pages with thumbnails, in your browser

JPG to PDF

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Combine several images into one PDF with paper size, margin and orientation, in the browser

PDF to JPG

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Render PDF pages to JPG or PNG at a chosen DPI and download a ZIP, in the browser

Watermark PDF

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Add text or image watermarks to PDF pages with position, angle, opacity and tiling, in the browser

Add Page Numbers to PDF

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Add page numbers, header and footer text and Bates numbers to a PDF with position, style and first number

Crop PDF

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Crop PDF page margins manually or by detecting white space, applied as a CropBox in the browser

Wheel Spinner

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A picker wheel with weights, saved lists and share links

Team Generator

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A random team maker with keep-together and keep-apart rules

Raffle Picker

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A no-repeat raffle with a proof image carrying draw time and SHA-256 hashes

Seating Chart

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A random seating chart with locked seats, empty seats and print view

Dice Roller

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An online dice roller that understands 2d6+3 notation

Random Number Generator

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A crypto-grade random number generator with ranges, unique mode and decimals

Coin Flip

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A fair online coin flip with running heads, tails and streak statistics

Online Timer

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A free countdown timer with fullscreen mode and a generated alarm sound

Online Stopwatch

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A free stopwatch with laps, splits and fullscreen mode

Pomodoro Timer

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A free Pomodoro timer that chains focus sessions and breaks

World Clock

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A world clock with time differences and a meeting time planner

Date Calculator

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Days between dates, a countdown timer and add/subtract days in one tool

Server Time Checker

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See a website's real server clock and how far off your own clock is

Percentage Calculator

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A percentage calculator that shows the formula behind every answer

Age Calculator

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An age calculator with exact years, months, days and a birthday countdown

Loan Calculator

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Monthly payment, total interest and a full amortization schedule with CSV download

Savings Calculator

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Deposit and monthly savings interest, simple or compound, with optional tax

Margin Calculator

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Solve cost, price, margin and markup from any two, with fees, shipping and tax

BMI Calculator

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A BMI calculator with WHO categories and a healthy weight range

Unit Converter

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A two-way unit converter for seven categories, with exact definitions

Split Bill Calculator

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A multi-round bill splitter with exact rounding and settle-up transfers

Anniversary Calculator

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Dates for day 100, day 1000 and yearly anniversaries from a start date

Fuel Cost Calculator

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Trip fuel cost, cost per person and fuel economy from a fill-up

Shoe Size Converter

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Convert Korean mm shoe sizes to US, UK, EU and Japan sizes, and back

Ring Size Calculator

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Convert ring diameter and circumference, and match your finger to your own size chart

Tire Size Calculator

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Overall diameter from a tire code, plus speedometer and odometer error for a new size

Recipe Unit Converter

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Convert cups, spoons, grams and milliliters using ingredient densities

Recipe Scaler

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Paste ingredients and scale amounts and units to any number of servings

Trip Expense Splitter

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Settle group expenses with the fewest payments and copy a shareable summary

BMR and TDEE Calculator

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BMR, TDEE and a calorie target from four published equations

Due Date Calculator

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Due date and gestational age from your last period or a fertility procedure

Ovulation Calculator

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Ovulation and fertile window estimates from your cycle, as a table and calendar

Body Fat Calculator

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Body fat percentage from the US Navy tape method or a BMI estimate

Macro Calculator

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Split a calorie target into grams of carbs, protein and fat

Ideal Weight Calculator

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Normal weight range for your height, with ideal weight formulas side by side

Period Calendar

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Next period dates as a table and calendar, with saved records and an average cycle

Pregnancy Weight Gain

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Recommended pregnancy weight gain by pre-pregnancy BMI, with a week-by-week reference range

Character Counter

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A character and word counter with bytes and platform length presets

Case Converter

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See nine case formats side by side and copy the one you need

Text Diff

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A diff checker that highlights what changed between two texts

Markdown Preview

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A live Markdown editor with sanitized HTML you can copy or save

Sort Lines

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Sort or shuffle lines with natural number ordering

Remove Duplicate Lines

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Delete repeated lines and keep the first of each, in order

Text to Speech

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Read text aloud with your browser's voices, with speed and pitch controls

Lorem Ipsum Generator

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Classic Lorem Ipsum by paragraphs, sentences or words, with optional HTML tags

Typing Speed Test

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A typing speed test with net WPM, accuracy and clear scoring rules

Reaction Time Test

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A click-on-green reaction time test with five-try average and median

Keyboard Tester

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A key-by-key keyboard tester with held keys and rollover count

Dead Pixel Test

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A full screen color cycle to find dead and stuck pixels, plus optional flashing

Biorhythm Calculator

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Physical, emotional and intellectual cycles from your birth date

JSON Formatter

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Beautify, minify and validate JSON, sort keys, errors with line and column

Base64 Encoder/Decoder

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A Base64 encoder and decoder that gets Unicode right

Regex Tester

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JavaScript regex tester with flags, match highlighting, group table and replace preview

URL Encoder/Decoder

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A URL percent-encoder and decoder that handles Unicode and emoji

JWT Decoder

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Decode JWT header and payload and check expiry (no signature verification)

Hash Generator

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MD5 and SHA hashes for text and files, computed in the browser

UUID Generator

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Create UUID v4 and sortable v7 values in bulk

Password Generator

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A random password generator built on the browser's crypto RNG