Useful tools. Your data stays on your device.

Merge PDF

Combines several PDF files into one, in the order you choose.

Compress PDF

Makes PDF files smaller by re-saving the photos inside them, while text stays sharp and selectable.

JPG to PDF

Turns photos and images into a PDF, one page per image, on A4, Letter or image-sized pages.

PDF to JPG

Turns each page of a PDF into a JPG image, at screen, standard or print quality.

Split PDF

Splits a PDF into separate files by page ranges, into single pages, or every few pages.

Delete Pages

Removes unwanted pages from a PDF by tapping their thumbnails or typing page numbers.

Compress Images

Makes JPG, PNG and WebP images smaller with adjustable quality, without uploading them anywhere.

Resize Images

Resizes images by percentage, to fit within a size, or to exact pixel dimensions, one or many at a time.

PNG to JPG

Converts PNG images to JPG, filling transparent areas with a background colour you choose.

JPG to PNG

Converts JPG photos to lossless PNG files, for editing or for apps that require PNG.

WebP to JPG

Converts WebP images, common on websites, into JPG files that open in every app.

Crop Image

Crops an image with a drag-to-select box and preset shapes such as square, 16:9 and 9:16.

Word Counter

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

Case Converter

Changes text to UPPER CASE, lower case, Title Case, Sentence case, camelCase, snake_case, kebab-case and more.

Text Diff

Compares two versions of text and highlights added, removed and changed lines and words.

Markdown Previewer

Shows Markdown formatted as you type, with tables, task lists and code blocks, and exports it as HTML.

Remove Duplicates

Removes repeated lines from a list, keeping the first copy of each and the original order.

Find & Replace

Finds and replaces text, with options for case, whole words and regular expressions.

JSON Formatter

Formats messy or minified JSON into clean, indented, readable text, and points out any errors.

JSON Validator

Checks whether JSON is valid and explains each error in plain language, with its exact line and column.

CSV to JSON

Converts CSV spreadsheets into JSON, using the header row for property names and detecting numbers.

JSON to CSV

Converts a JSON array into a CSV file for Excel or Google Sheets, flattening nested objects.

JSON Diff

Compares two JSON documents by their data, listing every added, removed and changed value by path.

JSON to TypeScript

Generates TypeScript interfaces from a JSON example, including nested objects, arrays, optional and nullable fields.

QR Code Generator

Creates QR codes for links, text, Wi-Fi networks, email, phone numbers and SMS, and downloads them as PNG or SVG.

Password Generator

Creates strong random passwords of any length, with your choice of letters, numbers and symbols.

UUID Generator

Generates random UUID v4, time-sorted UUID v7, ULID, NanoID and MongoDB ObjectId identifiers, one or a thousand at a time.

QR Code Reader

Reads QR codes from photos, screenshots or your camera, and shows the link, Wi-Fi password or text inside.

ObjectId Generator

Generates MongoDB ObjectIds, shows the creation date inside any ObjectId, and makes an ObjectId from a date for range queries.

NanoID Generator

Generates NanoIDs and random strings of any length, from letters, numbers or your own characters, with a uniqueness estimate.

JWT Decoder

Decodes a JSON Web Token to show its header and claims, explains each claim, and tells you if it has expired.

Hash Generator

Calculates SHA-256, SHA-512, SHA-384, SHA-1 and MD5 hashes of any text at once.

File Checksum

Calculates the SHA-256, SHA-512, SHA-384 and SHA-1 checksum of any file and checks it against the one you expect.

HMAC Generator

Creates HMAC-SHA256 (and SHA-512, SHA-384, SHA-1) signatures, and checks webhook signatures.

Date Difference

Counts the years, months, days and working days between two dates, or adds and subtracts days, weeks and months.

Unix Timestamp

Converts Unix timestamps to readable dates and back, detecting seconds, milliseconds, microseconds and nanoseconds.

ISO 8601 Converter

Converts dates to and from ISO 8601, including time zone offsets, week dates, ordinal dates and durations such as P1DT2H.

Cron Generator

Builds cron expressions from plain choices such as “every weekday at 9:30” and writes them for crontab, Kubernetes, GitHub Actions, AWS and Quartz.

Cron Parser

Explains cron expressions in plain English and lists the next run times in any time zone.

Base64 Decode

Converts Base64 back into readable text, or into the original file (such as an image or PDF) when it is not text.

Base64 Encode

Converts text or a file into Base64, with URL-safe and line-wrapping options.

URL Decode

Turns percent-encoded URLs and query strings (%20, %C3%A9…) back into readable text.

URL Encode

Percent-encodes text for use in URLs and query strings, handling spaces, symbols and any language.

HTML Entities

Escapes text for safe use in HTML (< becomes &lt;) and decodes entities like &eacute; back into characters.

HTTP Status Codes

Explains every common HTTP status code in plain language, with what to do about errors.

cURL to Python

Converts cURL commands into Python code using the requests library.

cURL to fetch

Converts cURL commands into JavaScript fetch code, including headers, JSON bodies, forms and auth.

URL Parser

Breaks a URL into its parts and decodes every query parameter, flagging tracking parameters.

User Agent Parser

Identifies the browser, rendering engine, operating system and device type from a user agent string.

cURL to axios

Converts cURL commands into Node.js code using axios.