Focused workflowsEach tool stays centered on one job
Focused tools. Ready now.
Practical tools for PDFs, images, color, music and mathematics.
Work with PDFs, permanently redact an image, generate a color palette, practice piano or solve mathematics exercises. Free, with no account or installation.
When a tool uses files, they stay on this device and are never uploaded.
Local file processingYour files stay on your device
No accountOpen a tool and start
Free to useNo trial or paywall
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Choose what you need
PDF Tools
Merge PDF
Combine several PDF files into one document, arrange their order and download the finished copy.
Merge PDFs Your files are combined locally and never uploaded.
Split PDF
Separate one PDF into individual pages or custom page groups, with every result ready to download.
Split a PDF The PDF is split locally and never uploaded.
Reorder PDF
See every page, move it by drag, touch or keyboard controls, then download the PDF in its new order.
Reorder a PDF Your PDF stays on this device while you arrange it.
Protect PDF
Add an opening password to a PDF and download a strongly encrypted copy while keeping the original.
Protect a PDF The file and password stay in this browser tab and are never uploaded.
Unlock PDF
Unlock one or more PDFs with known passwords or ordinary printing, copying and editing restrictions, then download individual copies or a ZIP.
Unlock PDFs The PDFs and their passwords are processed locally in your browser and are never uploaded.
PDF Scanner
Photograph pages or choose images, arrange and rotate them, then control the PDF page size and quality before downloading.
Create a PDF The PDF is assembled in your browser. Your source images stay on this device.Image Tools
Redact image
Draw solid covers or destructive pixelation over sensitive details, then download a flattened copy with metadata removed.
Redact an image Covered pixels are replaced permanently; no original pixels or edit layers remain underneath.
Optimize images
Compress, resize and convert images together, then compare and download every result.
Optimize images Your images are processed locally and never uploaded.
Favicon and app icon generator
Turn one image into browser favicons, an Apple touch icon, installable app icons, a web manifest and ready-to-copy integration code.
Create icon package Your source image is processed on this device and is never uploaded.Color Tools
Generate color palette
Generate varied three-to-eight-color palettes, lock and reorder favorites, edit HEX or RGB values, and export reusable results.
Generate a palette Generation happens locally. Press Enter to explore again while keeping locked colors.
Check color contrast
Test a color pair against WCAG and repair a failing color.
Check contrast Free · Private · No account
Convert colors and check gamut
Convert one color across five formats and see whether it fits sRGB or Display-P3.
Convert a color Free · Private · No accountMusic Tools
Practice piano
Connect a USB MIDI piano or keyboard, follow falling notes without a timer, import songs and record your playing.
Practice piano Runs locally in current desktop Chrome. USB MIDI support depends on the device and operating-system driver.Mathematics Tools
Practice mathematics
Work through arithmetic, one-variable equations or two-variable systems one exercise at a time.
Practice mathematics Exercises, answers and printable PDFs are created locally. No account or learner history.Privacy by design
How local processing works
- 1Your browser does the work
Each tool runs directly in your browser, with no account, app download or setup.
- 2Files stay on your device
When a tool uses files, it reads only the ones you choose and does not upload them.
- 3You choose what to save
Results stay in the current session until you copy or download them.