Audio compressor
Reduce audio file size by choosing an output format and bitrate.
Toolbox
Browse all available tools, organised by category.
Import a resource, apply several transformations and export the result from one workspace.
Convert and prepare audio files locally in your browser with reusable Workspace transformations.
Reduce audio file size by choosing an output format and bitrate.
Convert audio files locally to MP3, WAV, FLAC, OGG, M4A or Opus.
Add fade-in and fade-out effects to an audio file.
Normalize the perceived loudness of an audio file to a LUFS target.
Join multiple audio files in the selected order.
Speed up or slow down an audio file without changing pitch.
Keep only the useful part of an audio file.
Increase or reduce the volume of an audio file.
Resample audio to 44.1 kHz, 48 kHz or another rate.
Convert a FLAC file to MP3 locally in your browser.
Convert an M4A file to MP3 locally in your browser.
Convert audio to mono or stereo.
Convert an MP3 file to WAV PCM locally in your browser.
Convert an OGG file to MP3 locally in your browser.
Convert a WAV file to MP3 locally in your browser.
Extract and convert WebM audio to MP3 locally in your browser.
Reverse an audio file directly in your browser.
Split the left and right channels of stereo audio into two mono files.
Estimate areas, volumes, slopes, materials, and quantities for construction, renovation, and building projects.
Estimate bricks, joints, wall volume and mortar.
Calculate concrete blocks, pallets and mortar bags for a wall.
Calculate concrete volume and the cement, sand, gravel or bags required.
Estimate decking boards, joists, fixings and waste.
Calculate plasterboards, tracks, studs and screws for a partition or ceiling.
Calculate fence panels, posts and footing concrete.
Calculate packs, underlay, surplus and skirting boards for your floor.
Calculate gravel volume, weight, bags or bulk bags to buy.
Calculate paintable area, litres required and paint containers to buy.
Calculate pavers, packs, joints and bedding volume.
Calculate render area, kilograms and bags.
Calculate sloped roof area and the number of tiles required.
Calculate screed volume, dry mix, cement, sand and bags.
Convert slope between percent, degrees, rise, length and ratio.
Calculate steps, riser height, going, angle and the Blondel formula.
Calculate area, volume, packs and thermal resistance R of insulation.
Calculate tiles, boxes and quantities to order.
Calculate drops and rolls from dimensions and pattern repeat.
Clean, compare, convert, and structure CSV files, spreadsheets, tables, and other tabular data.
Remove duplicates, empty rows and unnecessary spaces.
Compare two Excel or CSV files using a key column and spot the differences.
Convert Excel, CSV, and other spreadsheet formats directly in your browser.
Convert tabular text between comma-separated and tab-separated formats.
Convert CSV data to JSON or JSON to CSV while preserving useful structure.
Rename one or more CSV columns without changing the row data.
Select the CSV columns you want to keep in the final result.
Compare two CSV files to quickly identify rows and values that differ between them.
Remove duplicate CSV rows using the columns you choose as matching criteria.
Filter CSV rows by column using text, exact values, or numeric conditions.
Merge multiple CSV files into one table while keeping columns aligned consistently.
Sort CSV rows by a selected column in ascending or descending order.
Split a CSV file into smaller files using the size or groups you choose.
Analyze CSV columns and quickly get useful statistics about your data.
Validate CSV structure and quickly identify problematic rows or columns in your data.
Find duplicate lines, count occurrences and export a clean summary.
Merge multiple Excel or CSV files into one table with automatic column alignment.
Split an Excel file into multiple sheets based on values from a selected column.
Calculate date differences, durations, ages, timestamps, calendars, and other time-related values.
Add or subtract days, weeks, months or years from a date.
Calculate an exact age from a date of birth and a reference date.
Count business days between two dates, excluding Saturdays and Sundays.
Calculate business hours between two date-times.
Calculate the exact difference between two dates in days, weeks, months, or years.
Convert dates between ISO, day-first and month-first formats.
Generate a list of dates between two endpoints.
Find the weekday for any date.
Find a date’s ordinal day within the year.
Calculate how many days remain until a date, or how many days have passed.
Convert seconds, minutes, hours, days and weeks.
Find the ISO week number of a date and the start and end dates of that week.
Find overlapping meeting times across two time zones.
Generate a daily, weekly, monthly or yearly series.
Express a difference as “3 days ago” or “in 2 hours”.
Calculate the duration between a start time and an end time.
Convert a date and time between two time zones.
Convert a Unix timestamp to a readable date or turn a date into a Unix timestamp.
Calculate worked hours after subtracting breaks.
Format, convert, analyze, and generate JSON, code, queries, formats, and technical data for development workflows.
Create a .gitignore file from presets for your technologies and tools.
Build a complete HTTP API request with method, URL, parameters, headers, and body.
Encode text as Base64 or decode a Base64 string back to its original content.
Build a standard cron expression, understand it and preview its next execution times.
Format or minify CSS to improve readability or reduce file size.
Generate a complete cURL command from an HTTP request.
Generate realistic fake datasets in JSON, CSV or SQL.
Generate a JSON Schema from a JSON example locally in your browser.
Encode or decode common HTML entities to convert special characters in text.
Format or minify HTML to improve readability or reduce file size.
Analyze HTTP headers to review security, caching, CORS, and cookie behavior.
Build custom HTTP headers and get output ready to use in your requests.
Format or minify JavaScript to improve readability or produce a more compact version.
Convert JSON data to XML or XML data to JSON directly in your browser.
Convert JSON data to YAML or YAML data to JSON directly in your browser.
Compare two JSON documents and highlight structural differences.
Format, minify, and validate JSON to make it easier to read or more compact.
Validate a JSON document against a schema and locate every error precisely.
Generate TypeScript interfaces, types, Zod schemas, or JSON Schema from sample JSON.
Query JSON data with a simple JSONPath expression.
Convert text between LF, CRLF and CR line endings.
Find a MIME type from an extension or the other way around.
Test a regular expression against text and inspect the matches it returns.
Format or minify SQL queries to improve readability or reduce their size.
Convert Unix permissions between octal and symbolic notation and generate a chmod command.
Generate one or more random UUID v4 identifiers instantly and copy them when needed.
Format, minify, and validate an XML document directly in your browser.
Test an XPath expression against XML and immediately inspect the matching results.
Format and validate a YAML document to improve readability and detect common errors.
Calculate loans, payments, interest, VAT, margins, ROI, break-even points, salaries, and other useful finance and business indicators.
Calculate the revenue and sales volume needed to cover your costs.
Calculate CAGR between an initial and a final value.
Calculate capital growth with compound interest and regular contributions.
Calculate your total debt-to-income ratio, housing ratio and remaining monthly borrowing room.
Calculate a discounted price, the amount saved, or the discount percentage.
Estimate the day rate you need to reach a target monthly net income.
Estimate net pay before income tax from gross salary, or calculate gross pay from net.
Convert hourly, weekly, monthly or annual pay based on your working time.
Estimate how inflation affects an amount.
Estimate internal rate of return from an initial investment and future cash flows.
Simulate a loan, calculate monthly payments and total cost, and view a complete amortization schedule.
Calculate gross margin, margin rate, markup rate and selling price.
Estimate how much you can borrow and the home price you may afford from income, debts, down payment, rate and term.
Calculate net present value from an initial investment, future cash flows and a discount rate.
Calculate how long an investment takes to recover, with simple and discounted cash flows.
Calculate the gross and net yield of a rental property investment.
Calculate ROI, net gain and the total cost of an investment.
Calculate your new salary after a raise or find the percentage needed to reach a target salary.
Calculate sales commission from revenue and the applicable commission rate.
Calculate simple interest and final amount.
Instantly calculate net price, VAT and gross price in either direction.
Convert, resize, optimize, analyze, and prepare images, colors, and graphical assets directly in your browser.
Calculate proportional dimensions for images and videos.
Preview an image as it may appear with different types of color vision deficiency.
Convert a color between HEX, RGB, and HSL with equivalent values.
Generate a coordinated color palette from a starting color for your design.
Convert an image to PNG, JPEG, or WebP and adjust output quality before download.
Combine multiple images into an animated GIF directly in your browser.
Create multiple PNG favicon sizes from a source image directly in your browser.
Convert an image to Base64/Data URI and convert Base64 back to an image.
Extract a dominant color palette from an image without uploading it to a server.
Compare two images side by side or with a before/after slider.
Select an area visually, lock an aspect ratio, and export the cropped image locally.
Inspect image dimensions, format, size and browser-readable metadata.
Re-encode an image locally to remove embedded metadata.
Add text or a logo locally with adjustable position, opacity, size, and rotation.
Create a QR code locally for text, a URL, email, phone number or Wi-Fi network.
Read the content of a QR code from an image directly in your browser.
Resize an image by setting its exact width and height before downloading the result.
Create multiple image widths and automatically generate srcset and picture markup.
Reduce SVG markup locally while keeping the graphic editable.
Turn an SVG into PNG, JPEG, or WebP with custom dimensions and background.
Solve conversions, percentages, geometry, theorems, number operations, and practical calculations with explicit results and formulas.
Convert bar to PSI or PSI to bar instantly.
Calculate X% of a number instantly, for example 20% of 150.
Convert degrees Celsius to degrees Fahrenheit instantly, or switch direction to convert Fahrenheit to Celsius.
Write a euro amount in words for a cheque or check, with euros and cents handled automatically.
Calculate the area of a circle instantly from its radius.
Calculate the circumference of a circle instantly from its radius.
Convert centimeters to inches instantly, or switch direction to convert inches to centimeters.
Convert cubic meters to liters or liters to cubic meters instantly.
Calculate the final price after a discount and the amount saved instantly.
Convert feet to inches or inches to feet instantly.
Choose a shape, enter the dimensions you know and instantly calculate everything that can be derived.
Convert hectares to acres or acres to hectares instantly.
Convert kilograms to pounds (lb) instantly, or switch direction to convert pounds to kilograms.
Convert kilometers to miles instantly, or switch direction to convert miles to kilometers.
Convert kilometers per hour to miles per hour or MPH to KM/H instantly.
Convert knots to kilometres per hour or km/h to knots instantly.
Convert kilowatts, metric horsepower (PS) and mechanical horsepower (hp) without treating them as identical.
Convert kilowatt-hours to joules or joules to kWh instantly.
Convert liters to imperial UK gallons or UK gallons to liters instantly.
Convert liters to US gallons or US gallons to liters instantly.
Convert square meters to square feet or square feet to square meters instantly.
Convert decimal storage units MB/GB and binary units MiB/GiB correctly.
Convert meters to feet or feet to meters instantly.
Convert millimeters to inches instantly, or switch direction to convert inches to millimeters.
Convert a number to words or written words back to digits, with a euro amount mode for cheques and documents.
Convert whole numbers between bases 2 and 36, including binary, octal, decimal and hexadecimal.
Convert ounces to grams or grams to ounces instantly.
Calculate a percentage, a change, or recover an original value.
Calculate the percentage decrease between an initial value and a final value.
Calculate the percentage increase between an initial value and a final value.
Convert pounds (lb) to grams or grams to pounds instantly.
Convert PSI to kilopascals or kPa to PSI instantly.
Calculate a side of a right triangle with the Pythagorean theorem or test whether a triangle is right using its converse.
Generate one or more random numbers using the range and quantity you choose.
Calculate the area of a rectangle instantly from its length and width.
Calculate the perimeter of a rectangle instantly from its length and width.
Calculate the area of a square instantly from its side length.
Calculate the perimeter of a square instantly from its side length.
Calculate a missing length with Thales’ theorem or test parallel lines with its converse.
Calculate the area of a triangle instantly from its base and height.
Calculate the perimeter of a triangle instantly from its three side lengths.
Instantly convert length, mass, temperature, volume and dozens of other units.
Calculate what percentage one value represents of another.
Convert yards to metres or metres to yards instantly.
Merge, split, convert, reorder, and enhance PDFs and documents, including by adding images, without unnecessary remote processing.
Place a signature image on the PDF page you choose.
Add a text watermark to every page of a PDF locally in your browser.
Place a PNG or JPEG image on the PDF page you choose.
Automatically add page numbers to your PDF document.
Add recurring text with automatic page numbers.
Add text to one or more pages at a precise position.
Correct contrast, brightness and saturation or convert a PDF to grayscale.
Inspect pages, size, version, metadata, forms, annotations and active elements in a PDF.
Highlight or frame an area and add a visible note.
Control printing, modifications and content extraction with an AES-256 owner password.
Compare two PDFs page by page and measure their visual differences locally.
Reduce PDF file size locally with lossless optimization or stronger visual compression.
Rearrange PDF pages into spreads ready for duplex booklet printing.
Crop PDF pages by defining the margins to remove directly in your browser.
Draw freehand with the color and line width you choose.
Edit or remove common PDF metadata directly in your browser.
Recover raster images embedded in a PDF without converting whole pages to images.
Select the pages you want to keep and create a new PDF containing only that selection.
Flatten form fields or create a visually fixed PDF directly in your browser.
Combine several images into a single PDF document.
Merge multiple PDF files in the order you choose to create one combined document.
Recognize text in a scanned PDF and create a searchable PDF directly in your browser.
Overlay the pages of one PDF onto another locally, with adjustable opacity.
Encrypt a PDF locally with a password and AES-256 without uploading your document.
Add text, annotations, images, drawings or a signature directly to your PDF.
Convert PDF pages into individual images ready to download directly in your browser.
Extract selectable text from a PDF and convert it to Markdown locally, without OCR or uploading the document.
Place 2, 4, 6 or 9 PDF pages on each A4 or Letter sheet.
Remove comments, highlights and other page annotations without changing the main content.
Automatically detect and remove blank PDF pages directly in your browser.
Remove unwanted pages from a PDF directly in your browser.
Visually reorder PDF pages with drag and drop or keyboard controls.
Repair a damaged PDF locally by rebuilding recoverable internal structures.
Resize every PDF page to a standard or custom size locally in your browser.
Rotate every page in a PDF or only the individual pages you select.
Clean a PDF locally by removing metadata, JavaScript, automatic actions and embedded attachments.
Permanently hide sensitive areas by rebuilding the document.
Split a PDF into multiple files using the pages or page ranges you choose.
Automatically split a PDF by a maximum number of pages or a target file size.
Add a visual stamp such as APPROVED, PAID or CONFIDENTIAL.
Remove PDF password protection locally when you know the current password.
Generate, analyze, and verify passwords, tokens, hashes, integrity data, and security mechanisms with local processing where possible.
Encrypt and decrypt text locally with AES-256-GCM and a password.
Generate an HTTP Basic Auth header and usage examples.
Create a Content Security Policy to strengthen your website security.
Compare two hashes or checksums to immediately verify whether they match exactly.
Generate a text hash using several common hashing algorithms.
Generate or verify SHA-256, SHA-384 and SHA-512 HMAC values locally.
Decode a JWT to inspect its header, payload, and main token information more easily.
Create a locally signed JWT with HS256, HS384, or HS512.
Inspect a JWT to review its header, payload, timestamps, and main token information.
Generate a random password using the length and character types you choose.
Generate a clear password policy from the security rules you choose for your organization.
Evaluate password strength from its length and character composition directly in your browser.
Generate HTTP security headers for the protections you want to enable on your site.
Generate a Subresource Integrity hash for a file or pasted content.
Inspect an X.509 certificate or CSR in PEM format locally.
Clean, transform, analyze, and prepare text, lists, written content, and textual data for everyday tasks.
Create brand, product, project or domain names — not personal names.
Change text case to lowercase, uppercase, title case, and other common formats.
Clean text by removing extra spaces, duplicate whitespace, and common formatting issues.
Compare two lists to identify shared items and values that differ between them.
Count how often each value appears in a list and quickly identify the most frequent items.
Automatically extract dates found in text and return them as a reusable list.
Extract every email address found in text and automatically remove duplicate results.
Convert HTML into readable portable Markdown directly in your browser.
Generate Lorem Ipsum placeholder text for mockups, prototypes, and layout testing.
Format Markdown text into a cleaner and more consistent structure for easier review.
Write Markdown and instantly preview the rendered HTML.
Convert Markdown into clean HTML directly in your browser.
Merge multiple lists into one set of lines ready to copy or reuse.
Automatically extract every number found in text and return the results as a reusable list.
Automatically add numbering before each line using the format you choose.
Estimate text readability and sentence complexity.
Remove duplicate entries from a list while keeping one occurrence of each value.
Automatically remove blank lines and lines that contain only whitespace from text.
Randomly shuffle the lines of a text block or list in a few seconds.
Sort list items alphabetically, numerically, or using the ordering option you choose.
Split a long list into evenly sized groups using the number of items you choose.
Compare two texts line by line and quickly spot additions, removals, and changes.
Analyze text and get word, character, line, sentence, and paragraph counts.
Analyze and prepare URLs, links, metadata, accessibility, and technical elements for the web, SEO, and page quality.
Measure contrast between two colors and check WCAG AA and AAA levels.
Create hreflang tags from localized page versions.
Analyze key SEO signals in HTML locally.
Detect noindex, nofollow and canonical inconsistencies from HTML.
Create SEO, Open Graph and Twitter/X tags for a web page.
Parse URL parameters or build a query string from key-value pairs.
Create a clear robots.txt file to guide web crawlers.
Create JSON-LD structured data ready to embed in a web page.
Preview a search result from a title and meta description.
Turn a title or phrase into a clean slug that is ready to use in a URL.
Encode or decode a URL, its parameters, and any special characters it contains.
Extract every URL from text and automatically remove duplicate addresses.
Validate, normalize and inspect web addresses locally.
Identify the browser, operating system, device and bots in a User-Agent string.
Add UTM parameters to a campaign URL.
Create an XML sitemap from a list of URLs.