Kostenlose Online-Tools
405+ free online tools for PDF, images, SEO, developers, color, and productivity. Fast, browser-based, and private — no signup, no installs, no limits. Search above or browse by category below.
Total tools405Available free tools
Categories15Active categories
Most usedCSV to ExcelPopular right now
Recently addedInterval Music RepeaterNewest tool
pOH Calculator
pOH calculator free — find pOH, pH, and [OH⁻] from hydroxide concentration or strong base molarity. Instant, no signup.
Audio Trimmer Cutter
Free online audio trimmer and cutter — cut, trim, and crop MP3, WAV, or M4A in your browser. No upload, no signup, private and instant.
GitHub README Downloader
Download README.md from any public GitHub repository URL — preview Markdown and save the file instantly. Free, no signup.
Port Scanner
Scan common TCP ports on a public host — check which services are reachable from the server.
Scientific File Converter
Free online scientific file converter: CIF, PDB, XYZ, MOL, SDF, SMILES, POSCAR, XSF, JSON, STL, OBJ. Browser-based, private, no signup.
Favicon Pack Generator
Free favicon pack generator — upload a logo and download PNG, ICO, Apple Touch, and PWA icons plus HTML tags and webmanifest. Private, in your browser.
Random Team Generator
Free random team generator — paste player names, choose how many teams, shuffle into balanced groups, and copy the roster.
Flute Tuner
Free flute tuner online — use your microphone to tune flute notes with a cents meter. A440 reference, private, in your browser.
Emoji Picker
Browse, search, and copy emojis by category with unicode details and recent history.
PDF Audiobook Reader
Free PDF audiobook reader — listen to a PDF aloud in your browser. Pause and come back later; your page and sentence stay saved on this device.
Guitar Chromatic Tuner
Free guitar chromatic tuner online — tune guitar, bass, or any instrument with your microphone. A440 reference, cents meter, private in your browser.