Công cụ trực tuyến miễn phí
370+ 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 tools37010.7K total uses
Categories15Active categories
Most usedJSON Formatter4.1K uses
Recently addedVS Code Extensions StoreNewest tool
Rain Animation Overlay
Free rain animation overlay for photos — add realistic rain for reels and export at original image quality. Runs in your browser.
Used 0 times•Updated never
Rain Animation for Video
Free rain animation for video — add realistic rain overlays for Reels and export at original resolution. Runs in your browser.
Used 0 times•Updated never
Graph Node Builder
Free graph node builder with React Flow — create flowcharts and node diagrams, connect edges, export JSON or PNG. Runs in your browser.
Used 0 times•Updated never
Metronome
Free online metronome — set BPM, beats per measure, accents, and Play/Stop. Accurate Web Audio clicks in your browser. No signup.
Used 0 times•Updated never
Flute Tuner
Free flute tuner online — use your microphone to tune flute notes with a cents meter. A440 reference, private, in your browser.
Used 0 times•Updated never
Flashcard Flipper
Free flashcard practice tool — paste term|definition lines or use sample decks. Flip cards, mark Know/Don't know, and shuffle.
Used 0 times•Updated never
Multiple Choice Quizzer
Free multiple choice quiz practice tool — paste questions or use a sample quiz. One question at a time, score at the end, review mistakes.
Used 0 times•Updated never
Typing Speed Practice
Free typing speed practice tool — type a short passage and see live WPM and accuracy. Restart anytime with easy or medium samples.
Used 0 times•Updated never
Spelling Practice
Free spelling practice tool — see a definition or scrambled letters and type the correct spelling. Instant correct/incorrect feedback.
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Mental Math Drill
Free mental math drill practice tool — timed addition, subtraction, and multiplication with live score and streak. Press Enter for the next problem.
Used 0 times•Updated never
Times Tables Trainer
Free times tables trainer — pick a multiplication table from 2 to 12, practice random prompts, and track your mastery percentage.
Used 0 times•Updated never
Unit Conversion Practice
Free unit conversion practice tool — convert between km and mi, °C and °F, and more. Check answers with tolerance and see a worked step.
Used 0 times•Updated never