HumpbackHumpback

Free tools. Nothing leaves your device.

File tools that stay on your side of the screen.

Humpback is a pile of small, fast tools for the file busywork you run into every day — compress an image, merge a PDF, hash a string. Everything runs as JavaScript right here in this tab. Nothing you open or convert is ever uploaded.

Screen RecorderRecord your screen or a tab — nothing is ever uploaded. PDF Password ProtectorAdd a real AES-256 password to a PDF, entirely in your browser. TokenizerSee token counts, IDs, and boundaries for GPT-4o and GPT-3.5/GPT-4. QR Code GeneratorTurn text or a link into a QR code. Text Diff CheckerCompare two texts side by side and spot every change.
See all 22 tools ↓

Every tool

PDF5
Image to PDFCombine images into a single PDF. PDF to ImageTurn PDF pages into PNG or JPG images. PDF MergeCombine multiple PDFs into one. PDF SplitBreak a PDF apart into single-page files. PDF Password ProtectorEncrypt a PDF with a real password using AES-256.
Image3
PNG to SVGTrace a logo or icon into a real, scalable vector. Image CompressorShrink JPG, PNG, or WebP files. Color ConverterConvert HEX, RGB, and HSL with a picker.
Dev7
JSON FormatterFormat, minify, and validate JSON. Base64 Encode / DecodeEncode text or files and decode Base64. URL Encoder / DecoderSafely encode or decode full URLs. CSV ↔ JSON ConverterConvert structured CSV and JSON data. Hash GeneratorGenerate MD5, SHA-1, and SHA-256 hashes. Text Diff CheckerCompare two texts side by side. TokenizerSee token counts, IDs, and boundaries for GPT-4o and GPT-3.5/GPT-4.
Generators3
QR Code GeneratorTurn text or a link into a QR code. Password GeneratorGenerate strong, random passwords. UUID GeneratorCreate one or many secure version 4 UUIDs.
Text3
Case ConverterSwitch text between title, camel, snake, and more. Timestamp ConverterConvert Unix timestamps and zoned dates. Markdown PreviewerLive GitHub-flavored Markdown preview, sanitized before it's shown.
Media1
Screen RecorderRecord your screen, window, or tab and download the video.