The Swiss Army knife
of the web

Beautify, minify and validate JSON with configurable indentation — instantly, in your browser.

Encode text to Base64 or decode Base64 back to text, with full UTF-8 (emoji) support.

Percent-encode or decode URLs and query strings using encodeURIComponent or encodeURI.

Combine multiple PDF files into one, in any order.

Extract specific pages or ranges from a PDF into a new file.

Remove unwanted pages from a PDF and download the rest.

Compress JPG, PNG and WebP images in your browser with a quality slider.

Resize images by pixels or percentage with aspect-ratio lock.

Convert images between JPG, PNG and WebP formats.

Compress video (H.264) to a smaller file, right in your browser.

Convert video between MP4, WebM and MKV in your browser.

Turn a clip of a video into an animated GIF.

Convert text to spoken audio using your device's built-in voices.

Dictate with your microphone and get a live transcript.

Play a pure tone at any frequency and waveform (Web Audio).

Generate SEO meta tags — title, description, keywords, robots and viewport.

Create Open Graph (og:) tags with a live social-share preview.

Generate Twitter/X card meta tags for rich link previews.

Count words, characters, sentences, paragraphs and reading time as you type.

Count characters with and without spaces, with limits for Twitter, meta tags and more.

Estimate how long text takes to read or speak at a chosen words-per-minute pace.

Calculate monthly loan payments, total interest and a full amortization schedule.

Estimate your monthly mortgage payment including principal, interest, property tax and insurance.

Compute your Equated Monthly Installment (EMI) with a principal-vs-interest breakdown.

Calculate your Body Mass Index and see your weight category on a visual scale.

Find your Basal Metabolic Rate — the calories your body burns at complete rest.

Estimate your daily calorie needs (TDEE) plus targets for losing or gaining weight.

Calculate your grade point average from course grades and credit hours.

Combine semester GPAs into a cumulative CGPA weighted by credits.

Convert marks scored and total marks into a percentage and letter grade.

Create a clean, printable invoice with line items, tax and totals.

Calculate profit, profit margin and markup from cost and selling price.

Turn cost and markup % into a selling price, profit and margin.

Calculate social media engagement rate by followers or reach.

Turn keywords into dozens of relevant hashtags for your posts.

Check your caption length against every major platform's limit at once.

Plan a full travel budget across flights, hotels, food and activities.

Estimate the fuel cost of a trip and split it between passengers.

See the current time across major cities around the world, live.

Calculate your exact age in years, months and days — plus total weeks, hours and your next birthday.

Find the number of days, weeks, weekdays and weekend days between any two dates.

Work out percentages three ways: X% of Y, X is what % of Y, and percentage change.