QR Code Generator
Generate a PNG QR code with optional colors, error correction, and a center image.
Server processing · PNG download
Instructions and exampleConvert a short video, prepare a document, fix an image, or inspect a file. These tools work without an account or payment. Each has instructions, an example and clear limits.
17 tools available.
Media
Image Converter
Convert to PNG, JPEG, or WebP, resize images, and flatten transparency.
Server processing · 500 MiB request · 8 million pixels
Instructions and exampleShort Video Editor
Trim, crop, rotate, mute and convert a short video to MP4, MKV, WebM, MP3 or WAV.
Server processing · 200 MiB · 2000 × 2000 · 30 fps · 3 minutes
Instructions and exampleSubtitle Timing & Conversion
Convert SRT and VTT, shift subtitle timing, clean markup and inspect cue overlaps.
Runs in your browser · 1 million characters
Instructions and exampleImage Crop & Rotate
Crop by pixel coordinates, rotate, flip and resize a still image with a live preview.
Runs in your browser · 20 MiB · 8 million pixels
Instructions and exampleDocuments
PDF Toolkit
Merge PDFs, extract selected pages, rotate pages or split a PDF into individual files.
Server processing · 20 MiB total · 200 pages
Instructions and exampleRésumé Builder
Build a clean résumé with work experience, education and skills; print to PDF or save an editable draft.
Runs in your browser · no upload
Instructions and exampleInvoice Builder
Create an itemized invoice with quantity, price, discount and tax calculations, then print or save it.
Runs in your browser · no upload
Instructions and exampleData & text
Encoding Converter
Inspect UTF-8, hexadecimal, binary, Base64, decimal bytes, and Unicode.
Runs in your browser
Instructions and exampleFile & Text Hasher
Calculate SHA-256, SHA-384, SHA-512, or SHA-1 and compare an expected checksum.
Runs in your browser · files up to 64 MiB
Instructions and exampleJSON Formatter
Validate JSON, format it for reading, or compact it for transfer.
Runs in your browser
Instructions and exampleText Tools
Count words and characters, clean line endings, remove duplicate lines, and change case.
Runs in your browser
Instructions and exampleTimestamp Converter
Convert Unix seconds or milliseconds to UTC and local time, or convert an ISO date back.
Runs in your browser
Instructions and exampleCSV & JSON Table Tools
Read quoted CSV, convert tables to JSON, turn JSON records into CSV and remove duplicate rows.
Runs in your browser · 1 million characters
Instructions and exampleDesign & everyday
Color Contrast Checker
Compare foreground and background colors, calculate WCAG contrast and preview readable text.
Runs in your browser
Instructions and exampleUnit Converter
Convert length, area, mass, temperature, time, storage and data-transfer rates with explicit units.
Runs in your browser
Instructions and examplePassword Generator
Generate random passwords locally with adjustable length and character sets.
Runs in your browser · Web Crypto randomness
Instructions and exampleKnow where your data goes
Most tools run entirely in your browser. QR codes, image conversion, video conversion and PDF processing use the server. Video and PDF results are temporary and expire after one hour. Every tool identifies how it processes your input. Read the privacy details before submitting sensitive information.
Help that goes with the tools
Use the guide directory for step-by-step instructions and worked examples, or the FAQ for common questions. If something fails, leave a message and your email so the operator can reply.