Tools that stay on your device.
The shelf
Pick a tool, get an answer
36 of the most used tools, one click away. The full library of 368 sits behind one link.
Word Counter
Count words, characters, sentences, paragraphs and reading time as you type. Free, no sign-up, runs entirely in your browser.
Open toolSpeed Test
Measure your real download and upload speed and latency in the browser, with the numbers in Mbps and MB/s. No app, no account.
Open toolWhat Is My IP
See the public IP address the internet sees, plus your timezone, language, screen size and other details your browser exposes.
Open toolImage Compressor
Compress images in your browser with quality control and a live before/after size preview. No uploads.
Open toolMerge PDF
Combine several PDFs into one document in the order you choose. Pages, bookmarks and text stay intact.
Open toolJSON Formatter
Format, validate and minify JSON with precise error messages. Everything runs locally in your browser.
Open toolHash Generator
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes of text or files directly in your browser.
Open toolPDF to Word
Turn a text-based PDF into an editable Word .docx with one paragraph per extracted line. Runs in the browser, nothing uploaded.
Open toolBMI Calculator
Calculate body mass index in metric or imperial units and see the WHO category range for the result.
Open toolLoan Calculator
Estimate monthly instalments, total interest and total repayment for any loan amount, rate and term.
Open toolPassword Generator
Create strong random passwords with a custom length, symbols and passphrase options, generated only in your browser.
Open toolQR Code Generator
Generate QR codes for links, text, Wi-Fi and email. Choose colours, size and error correction, then download PNG or SVG.
Open toolCase Converter
Convert text to uppercase, lowercase, title case, sentence case, camelCase, snake_case and kebab-case in one click.
Open toolColor Converter
Convert colours between HEX, RGB, HSL and HSV, check contrast ratios and copy ready-to-use CSS values.
Open toolPercentage Calculator
Work out percentages, increases, decreases and percentage differences with the formula shown for each answer.
Open toolTimestamp Converter
Convert Unix timestamps to human-readable dates and back, in UTC and your local timezone.
Open toolUUID Generator
Generate cryptographically random UUID v4 values in bulk, then copy or download them as a list.
Open toolBase64 Encoder
Encode or decode Base64 text and files instantly. Unicode safe, no upload, no server involved.
Open toolImage Resizer
Resize images by exact pixels, a percentage, or the longest edge while keeping the aspect ratio locked.
Open toolCreate ZIP
Bundle any number of files into a single ZIP archive. Files are deflated in your browser with JSZip and downloaded as one archive.
Open toolText Diff Checker
Compare two texts and highlight added, removed and changed lines side by side. Works offline, nothing is uploaded.
Open toolImage Converter
Convert images between JPG, PNG and WebP instantly, with transparency handling and quality control.
Open toolUnit Converter
Convert length, weight, temperature, area, speed and data units with instant, accurate results.
Open toolDiscount Calculator
See what you pay and what you save with one or two stacked percentage discounts.
Open toolCSV to JSON
Convert CSV data into clean JSON with a custom delimiter, header detection and pretty or compact output.
Open toolAspect Ratio Calculator
Enter an original size and a new width or height — the other side is calculated to preserve the ratio.
Open toolAge Calculator
Calculate exact age from a date of birth in years, months and days, plus a countdown to the next birthday.
Open toolRegex Tester
Test regular expressions live with highlighted matches, capture groups and a replace preview.
Open toolMorse Code Translator
Translate text into Morse code and decode dots and dashes back into text, including numbers and punctuation.
Open toolLorem Ipsum Generator
Generate placeholder text by paragraph, sentence or word count, starting with the classic Lorem ipsum opening.
Open toolCalorie Calculator
Estimate basal metabolic rate and daily calories for maintenance, weight loss or weight gain.
Open toolCSS Gradient Generator
Design a gradient with two or three colours, adjust the angle and copy the CSS.
Open toolRobots.txt Generator
Create a valid robots.txt with allow and disallow rules, crawl delay and a sitemap reference. Presets for WordPress and staging.
Open toolhtaccess Redirect Generator
Turn a list of old and new URLs into Apache RewriteRule lines with 301 or 302 status.
Open toolJWT Decoder
Inspect the header and payload of any JWT and see its expiry status. Decoding only — the signature is not verified.
Open toolMeta Tag Generator
Generate title, description, canonical, robots, Open Graph and Twitter card tags in one click, with live character counters.
Open toolIndex
Browse by category
Text, developer, calculator and SEO tools — plus image editors and generators. Every page is one click away.
Text tools
Count, convert, clean and style writing
Image tools
Compress, convert, crop and retouch photos
Converters tools
Units, currencies of measure and pair conversions
Finance tools
Loans, interest, salary, pricing and profit
Files tools
JSON, CSV, XML, YAML, SQL and Markdown
Math tools
Percentages, averages, fractions and probability
Time tools
Ages, dates, hours and timestamps
Developer tools
Regex, cron, CSS and code formatting
Encoding tools
Base64, Base32, binary, Morse and entities
Generators tools
QR codes, passwords, mock data and placeholders
Health tools
BMI, calories, body fat, water and sleep
Design tools
Colours, gradients, shadows and radii
SEO tools
Audits, sitemaps, schema and on-page checks
Web tools
URLs, HTTP, MIME, redirects and servers
Security tools
Passwords, hashes, tokens and privacy
Marketing tools
Campaign links, meta tags and share cards
Education tools
GPA, grades, test scores and study maths
Why it is built this way