SellstampFree tools
Free tools for people who sell things
Small, single-purpose tools for the jobs that come up while running a shop — naming the thing and drawing a mark for it, the arithmetic of pricing it, the images and codes that go around it, the paperwork that follows it, and a few for building the site it sells from. Every one of them runs in your browser: no account, no limit, and nothing you open or type is uploaded to us. The domain checker is the single exception, and it says so — it has to ask a registry.
PDF tools
Convert, merge, split, sign and protect PDF files in your browser. Nothing is uploaded.
JPG to PDF
Photos into one PDF, unchanged and upright, in your order.PNG to PDF
Screenshots and graphics into a PDF, lossless.Image to PDF
Any mix of image formats into one PDF.Merge PDF
Several PDFs into one, in your order.Split PDF
Every N pages, by ranges, or at bookmarks.Extract PDF pages
Pick pages into a new PDF.Delete PDF pages
Drop the pages you do not need.Reorder PDF pages
Move, turn and remove pages with thumbnails.Rotate PDF
Turn all pages or some, saved for good.Add page numbers to PDF
Page 1 of 12, where and how you like.Watermark PDF
Text or a logo across every page.Crop PDF
Trim margins, with a preview.Sign PDF
Draw, type or upload, then place it.Fill PDF form
Fill fields, then flatten the answers in.Edit PDF metadata
Title, author and keywords, or clear them.Protect PDF
AES-256 password, set in your browser.Unlock PDF
Remove a password you know.Compress PDF
Re-compress the photos inside, honestly.Grayscale PDF
Black and white, for printing without colour.PDF to JPG
Each page as a JPG, at the DPI you choose.PDF to PNG
Each page as a lossless PNG.PDF to text
The text out, as a .txt file.Markdown to PDF
Paste Markdown, preview, save as PDF.HTML to PDF
Your HTML, printed to PDF by the browser.
Image tools
Convert, compress, resize, crop and clean up images in your browser, without uploading them anywhere.
Image resizer
Exact pixels or a percentage, as PNG, JPEG or WebP.Favicon generator
Every size a browser asks for, plus the tags to paste in.Background remover
A transparent PNG, cut out without uploading the photo.Image converter
Any image format to JPG, PNG, WebP, AVIF or BMP.PNG to JPG
PNGs to JPG, with a background you choose.JPG to PNG
JPGs to lossless PNG.WebP to JPG
WebP saved from the web, to JPG.WebP to PNG
WebP to PNG, transparency kept.JPG to WebP
Smaller photos for the web.PNG to WebP
Smaller logos and graphics, transparency kept.SVG to PNG
SVG to a PNG at any size.AVIF to JPG
AVIF to the JPG everything opens.PNG to ICO
A real multi-size .ico file.Compress image
Smaller photos, with sizes before and after.Crop image
Drag a frame or type exact pixels.Rotate image
Turn and mirror, in a batch.EXIF viewer
Camera, settings and location in a photo.Remove EXIF
Strip location and camera data, losslessly.Image color picker
Click a pixel, get its colour code.Color palette from image
The main colours of an image.Image to Base64
Data URL, CSS or HTML, ready to paste.Base64 to image
Paste Base64, get the image back.Social media image resizer
Square, portrait, story, header and more.Watermark image
Text or logo on a batch of photos.GIF maker
Images into an animated GIF.Sprite sheet splitter
A sheet into numbered PNG tiles.Collage maker
Photos into one layout, with even gaps.Mockup generator
Screenshots in a device frame.
Brand and code generators
Names, slogans, logos, business cards, QR codes and barcodes for something you are about to sell.
QR code generator
Any link or text to a QR code, with a logo in the middle.Barcode generator
CODE128 and EAN-13, with the check digit worked out for you.Business name generator
A word or two about what you sell, and a few hundred name ideas.Slogan maker
Your name and a keyword, in a tone you pick, as taglines.Business card maker
A real 300 DPI card, with bleed and a safe area if you need them.Domain name generator
Domain ideas, checked against the registry's own record.Logo maker
A mark, a monogram or a wordmark, as a transparent PNG and an SVG.
Business documents and policies
Invoices, purchase orders, shipping paperwork and the policies a shop needs, filled in and printed from your browser.
Invoice generator
Line items, tax and a total, ready to print or save as a PDF.Purchase order generator
A PO with line items, shipping, and a delivery address of its own.Pay stub generator
Gross, your own named deductions, and a net that is actually gross minus them.Bill of lading generator
Shipper, consignee, carrier, the goods, and the signature blocks.Shipping label generator
A 4x6 from-and-to label with a barcode of your own reference.Privacy policy generator
The categories you actually collect, and how people ask for them back.Terms and conditions generator
Acceptable use, IP, liability and a governing law you name yourself.Refund policy generator
Window, condition, exclusions, and how long the money takes.Cookie policy generator
The categories you set, and how a visitor turns them off.NDA generator
One-way or mutual, with the standard carve-outs and a term you set.Freelance contract generator
Scope, rate, who owns the work once it is paid for, and notice.
Business calculators
Margin, markup, break-even, loan, sales tax and currency arithmetic, worked out in front of you.
Profit margin calculator
Cost and price to margin, or a target margin to the price that hits it.Business loan calculator
Monthly payment and total interest on an amortising loan.Markup calculator
Cost plus markup to price, and price back to markup.Break-even calculator
Fixed costs, price and variable cost to the units that clear them.Sales tax and VAT calculator
Tax on top of a net price, or backed out of a gross one.Currency converter
31 currencies at the ECB's published daily reference rate.
Text tools
Count, compare, clean up and convert text in your browser.
Word counter
Words, characters and reading time, live.Case converter
Sentence, title, upper, camel, snake and more.Text compare
Differences between two texts, highlighted.Remove duplicate lines
De-duplicate a list, keeping its order.Sort lines
Natural A–Z, by length, reversed or shuffled.Find and replace
Plain or regex, with a replacement count.Lorem ipsum generator
Placeholder paragraphs, sentences or words.Slug generator
Titles to URL slugs, accents handled.Readability checker
Flesch scores and long sentences.Markdown to HTML
Markdown to HTML, with a safe preview.HTML to Markdown
HTML to clean Markdown.Text to speech
Read text aloud with your device's voices.
Developer tools
Formatters, converters, encoders and generators for building a site or an integration, all running locally.
Password generator
Cryptographically random, with the entropy shown honestly.UUID generator
Version 4, from the browser's own generator, one or a hundred at a time.JSON formatter
Pretty-print or minify, with the line and column of any error.Open Graph preview
A share card, an X card and a Google snippet, plus the tags to paste.JSON to CSV
JSON arrays to spreadsheet-ready CSV.CSV to JSON
CSV rows to typed JSON objects.JSON to YAML
JSON to YAML 1.2.YAML to JSON
YAML to JSON, with error positions.XML to JSON
XML to JSON, attributes and repeats handled.Base64 encode decode
Text to Base64 and back, UTF-8 safe.URL encode decode
Percent-encoding, and a URL's parameters.Hash generator
Checksums of text or a file.JWT decoder
Read a token's header, claims and expiry.Regex tester
Matches, positions and groups, safely.Cron expression explainer
Cron in plain English, with next runs.Unix timestamp converter
Epoch seconds and dates, both ways.Color converter
HEX, RGB, HSL and OKLCH.Contrast checker
WCAG contrast ratio and pass or fail.CSS gradient generator
Linear, radial or conic, with live CSS.Box shadow generator
Layered shadows, with live CSS.Meta tag generator
Title, description and share tags.Robots.txt generator
Crawler rules and sitemap lines.Sitemap generator
URLs to a valid sitemap.xml.UTM builder
Tagged links for campaign tracking.User agent parser
Browser, system and device from a UA.
Seller tools
Licence keys, licences, product copy, covers and the numbers behind selling digital products.
License key generator
Unique keys with a typo-catching check.EULA generator
A software licence agreement template.Digital product license generator
Personal, commercial or extended terms.Product description generator
A brief into three description lengths.Ebook cover maker
Title, author and colours into a cover.Product thumbnail maker
Headline, badge and product on a gradient.Payment fee calculator
Fees and net, or the price for a net.Refund rate calculator
Refund rate and the revenue it costs.Chargeback rate calculator
Dispute activity against 0.75%.SKU generator
Variant codes for every combination.Digital delivery email template
The email that delivers a download.
More are being added. This page is the list; it is always the complete one.
Some tools are also in EspañolPortuguês (Brasil)DeutschFrançaisItaliano
Then sell the thing.
Sellstamp gives a digital product a storefront, a checkout into your own payment account, and automatic delivery. Free to open.