Tools for images and SEO

Convert between JPG, PNG, WebP and AVIF - up to 50 images at once.

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Shrink image file size with a quality slider and see the saving.

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Analyse an image for web suitability, then optimise what it finds.

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Set an exact width or height, or scale by a percentage.

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Drag a box over the part you want and keep only that.

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Turn a photo by quarter turns, or straighten a crooked horizon.

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Mirror an image left to right or top to bottom.

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Stamp your name or logo onto a photo, in a corner or tiled across it.

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A whole favicon set from one logo, with the markup to paste in.

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Cut the background away from a subject with a neural network, on your device.

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Enlarge a small image 3x with a neural network rather than by stretching.

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Read the text out of a photo or screenshot, in your browser.

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Top and bottom captions on any picture, in the traditional style.

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Convert JPG to WebP — up to 50 images at once, in your browser.

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Convert PNG to WebP — up to 50 images at once, in your browser.

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Convert WebP to JPG — up to 50 images at once, in your browser.

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Convert PNG to JPG — up to 50 images at once, in your browser.

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Convert JPG to PNG — up to 50 images at once, in your browser.

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Convert AVIF to JPG — up to 50 images at once, in your browser.

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Convert WebP to PNG — up to 50 images at once, in your browser.

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Convert JPG to AVIF — up to 50 images at once, in your browser.

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Convert PNG to AVIF — up to 50 images at once, in your browser.

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Convert AVIF to WebP — up to 50 images at once, in your browser.

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Convert GIF to PNG — up to 50 images at once, in your browser.

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Convert BMP to JPG — up to 50 images at once, in your browser.

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Convert TIFF to JPG — up to 50 images at once, in your browser.

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Convert SVG to PNG — up to 50 images at once, in your browser.

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Join several PDFs into one file, in the order you choose.

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Break one PDF into separate files by page or by range.

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Reduce PDF size by re-encoding the images inside it.

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Render every page to a JPG at the resolution you pick.

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Render every page to a lossless PNG image.

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Turn photos into a single PDF, in the order you set.

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Combine PNG images into one PDF document.

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Any mix of images into one PDF, with page size options.

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Turn pages 90, 180 or 270 degrees and save them that way.

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Trim margins or crop every page to the area you want.

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Remove the pages you do not want and keep the rest.

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Pull the embedded images out of a PDF as separate files.

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Stamp text or an image across every page.

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Draw your signature and click the page to place it.

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Count words, characters and sentences, with reading and speaking time.

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Count characters and see how the text fits common platform limits.

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Switch text between twelve cases, from Title Case to snake_case.

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Strip repeated lines from a list and see how many went.

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Sort lines alphabetically, by length, by number, or shuffle them.

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Count sentences and paragraphs, with average sentence length.

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Count letters only, separated from digits, spaces and punctuation.

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Turn any text into UPPERCASE in one step.

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Turn any text into lowercase in one step.

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Apply real Title Case, with minor words left lowercase.

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Reverse text by character, by word or by line.

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See which words repeat most, and how often.

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Check keyword and phrase density as a share of the page copy.

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Estimate reading and speaking time from a real research figure.

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Score text with Flesch Reading Ease and grade level.

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Strip invisible characters, curly quotes and stray spacing.

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Replace text anywhere, with a count of what changed.

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Collapse repeated spaces, tabs and line breaks.

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Generate placeholder text by paragraph, sentence or word.

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Sixteen Unicode text styles you can paste anywhere.

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Script and bold script letters for names and bios.

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Small caps and superscript-style lettering.

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Flip text over, reversed and inverted.

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Stack combining marks for the corrupted look.

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Turn a short word into a block-letter banner.

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Format and minify JSON, with errors that name the line.

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Check JSON and get the line, column and cause of any error.

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Explore JSON as a collapsible tree instead of scrolling it.

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Turn an array of objects into a spreadsheet-ready CSV.

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Convert JSON to YAML, quoting only what needs it.

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Convert JSON to a well-formed XML document.

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Encode text to Base64, including emoji and non-Latin scripts.

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Decode Base64 back to text, with a clear error when it is not.

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Re-indent CSS without touching strings or data URIs.

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Strip whitespace and comments, leaving your values alone.

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Indent XML and check it is well formed, CDATA included.

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Convert XML to JSON, with attributes and repeated elements handled.

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Convert YAML config to JSON, refusing what it cannot read correctly.

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Indent HTML without moving inline elements or reflowing pre.

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Collapse whitespace and strip comments, keeping content spaces.

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Render Markdown to HTML with a sandboxed live preview.

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Convert HTML back to Markdown, keeping the structure that maps.

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Re-indent and space out JavaScript, without touching your strings.

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Strip comments and whitespace, writing semicolons where they were implied.

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Lay out a query by clause, leaving strings and comments alone.

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Build a cron expression from fields and see when it runs.

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Explain a cron expression in English and list its next runs.

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Pick a colour and get every notation, shades, harmonies and contrast.

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Convert a hex colour to RGB, including the alpha forms.

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Convert RGB or RGBA to a hex colour.

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Convert RGB to HSL, the notation that makes shades easy.

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Generate a strong password or passphrase, with the entropy shown.

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Draw numbers in a range, with or without repeats.

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Generate names drawn from lists spanning many regions.

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Split a list of names into teams of even size.

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Shuffle a list fairly, every ordering equally likely.

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Spin a wheel to pick one option from a list.

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Flip a fair coin and keep a short run of results.

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Roll any number of dice from d4 to d100.

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An even split when you cannot decide.

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The twenty classic answers, drawn evenly.

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Type an expression and see the answer as you go.

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Trigonometry, logarithms and powers, with a live answer.

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Work out percentages, changes and increases four ways.

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Age in years, months and days, counted by the calendar.

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Body mass index in metric or imperial, with the caveats.

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Convert a time between zones, with daylight saving handled.

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Count down to a date and keep counting past it.

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Set a timer that stays accurate in a background tab.

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Focus and break sessions, with a count of what you finished.

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Time something with laps, accurate against the system clock.

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Measure words per minute and accuracy as you type.

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Build title, description, Open Graph and Twitter tags with a live preview.

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Turn a list of URLs into a valid XML sitemap, with the mistakes flagged.

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Build JSON-LD for nine types, checked against what Google actually accepts.

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Turn questions and answers into FAQPage JSON-LD, safely escaped.

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Describe the trail to a page as BreadcrumbList JSON-LD.

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Write robots.txt rules visually, with validation as you go.

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Read a QR code from a photo or your camera, and see what it really says.

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Make QR codes for links, Wi-Fi, contacts and more, as PNG or SVG.

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Build a signature that survives Outlook, Gmail and Apple Mail.

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