Free online tools for images, PDFs, business, and developers

Calculate profit, margin, and markup from revenue and cost. Includes reverse calculation.

Compress JPG, PNG, and WebP images in your browser. Batch processing supported.

Combine multiple PDF files into one document. Set the file order before merging.

Convert JPG and PNG images to PDF with page size, orientation, and margin controls.

Convert every PDF page to a JPG image. Set quality and download as a ZIP.

Create professional invoices with line items, tax, discount, and notes. Download as PDF.

Format, validate, and minify JSON. Tree view with syntax error highlighting.

Reduce PDF file size in your browser by rebuilding the document structure.

Resize JPG, PNG, and WebP images to custom width and height in your browser.

Convert images to WebP, JPG, or PNG with quality control — including AVIF input when supported.

Convert HEIC and HEIF photos to JPG in your browser. Batch export supported.

Split a PDF into separate files or extract page ranges. Processed locally in your browser.

Calculate selling price, markup, and margin from cost—or find markup from your price.

Calculate return on investment (ROI) from amount invested and amount returned.

Apply one or two stacked discounts and see final price and total savings.

Decode JWT header and payload locally. Inspect claims—signature is not verified.

Encode or decode text to Base64 with optional URL-safe output—all in your browser.

Encode or decode URLs and query components with encodeURI or encodeURIComponent.

Convert Unix timestamps to readable dates and dates back to epoch seconds or milliseconds.

Test JavaScript regular expressions with live match highlighting, capture groups, and flags.

Count words, characters, sentences, and paragraphs with reading time and keyword density.

Convert text to Title Case, sentence case, camelCase, snake_case, kebab-case, or a clean URL slug.

Check title and meta description length, preview the search result, and copy ready-made meta tags.

Build campaign URLs with utm_source, utm_medium, and utm_campaign for Google Analytics.

Generate JSON-LD structured data for FAQ, Article, Organization, and Product pages.

Add or remove VAT or GST from a price. Use common rates or enter a custom percentage.

Convert a Word document (.docx) to PDF in your browser. Nothing is uploaded.

Calculate profit, margin, and markup from revenue and cost. Includes reverse calculation.

Compress JPG, PNG, and WebP images in your browser. Batch processing supported.

Combine multiple PDF files into one document. Set the file order before merging.

Convert JPG and PNG images to PDF with page size, orientation, and margin controls.

Convert every PDF page to a JPG image. Set quality and download as a ZIP.

Create professional invoices with line items, tax, discount, and notes. Download as PDF.

Format, validate, and minify JSON. Tree view with syntax error highlighting.

Reduce PDF file size in your browser by rebuilding the document structure.

Resize JPG, PNG, and WebP images to custom width and height in your browser.

Convert images to WebP, JPG, or PNG with quality control — including AVIF input when supported.

Convert HEIC and HEIF photos to JPG in your browser. Batch export supported.

Split a PDF into separate files or extract page ranges. Processed locally in your browser.

Calculate selling price, markup, and margin from cost—or find markup from your price.

Calculate return on investment (ROI) from amount invested and amount returned.

Apply one or two stacked discounts and see final price and total savings.

Decode JWT header and payload locally. Inspect claims—signature is not verified.

Encode or decode text to Base64 with optional URL-safe output—all in your browser.

Encode or decode URLs and query components with encodeURI or encodeURIComponent.

Convert Unix timestamps to readable dates and dates back to epoch seconds or milliseconds.

Test JavaScript regular expressions with live match highlighting, capture groups, and flags.

Count words, characters, sentences, and paragraphs with reading time and keyword density.

Convert text to Title Case, sentence case, camelCase, snake_case, kebab-case, or a clean URL slug.

Check title and meta description length, preview the search result, and copy ready-made meta tags.

Build campaign URLs with utm_source, utm_medium, and utm_campaign for Google Analytics.

Generate JSON-LD structured data for FAQ, Article, Organization, and Product pages.

Add or remove VAT or GST from a price. Use common rates or enter a custom percentage.

Convert a Word document (.docx) to PDF in your browser. Nothing is uploaded.