Tools starting with V
73 free online tools on AltFTool start with V, listed alphabetically. Every one is free, needs no sign-up and runs in your browser.
Match vacuum type, suction in air watts, filtration, bin size and battery runtime to your flooring, pets and home size.
Education & ScienceGenerate a ready-to-run Vagrantfile with box, hostname, networking, synced folders, provider resources and provisioner blocks.
DeveloperConvert text into full-width Unicode vaporwave aesthetic with decorative Japanese symbols and separators.
Text & WritingRead the fvar table out of a .ttf or .otf: every weight, width, slant and optical-size axis with its real min, default and max, every named instance, and the @font-face CSS those ranges imply — parsed in your browser.
Image & VideoInformational guide to traditional vastu colour suggestions by direction, with a compass-bearing lookup for each room.
LifestyleAdd or remove VAT/GST from an amount at any rate.
Finance & BusinessVector Storage Size Calculator
Estimate total vector index size from vector count, dimensions and data type, including HNSW or IVF overhead and replicas.
CalculatorsCompare vehicles easily by price, features, and performance.
Finance & BusinessVehicle Depreciation Value Calculator India
Estimate a vehicle's current value using the motor tariff depreciation slabs, plus the income tax written down value at 15 or 30 percent.
Finance & BusinessTrack insurance, PUC, RC, fitness, permit and licence expiry dates in one private list with days left and reminder dates.
ProductivityEstimate yearly savings from moving to a smaller car or a single-vehicle household, including fuel, insurance, depreciation and payback.
Finance & BusinessCalculate the Insured Declared Value of a car or bike using the India Motor Tariff GR.8 depreciation slabs.
Finance & BusinessConvert fuel economy between km/l, mpg and L/100km, vehicle speed between km/h and mph, and speed limit signs between countries.
ConvertersVendor Data Processing Inventory
Track vendors with their processing purposes, data categories and retention terms.
Security & PrivacyVertical Video Safe-Zone Previewer
Overlay the UI safe zones for Reels, Shorts and TikTok on your vertical video.
Marketing & SocialVideo Ad Length Compliance Checker
Check one video ad duration against the minimum, maximum and recommended lengths for each placement you plan to run it in.
Marketing & SocialCheck one video cut against the length, aspect ratio, file size and format rules of every major ad placement.
Marketing & SocialCalculate optimal video bitrate requirements for different formats and quality levels.
DeveloperCompress videos in your browser with quality presets, resolution caps, audio control, and preview export.
ProductivityConvert video to MP4, WebM, MOV, MKV, GIF or MP3 in your browser — resize to 1080p–360p, set CRF quality and fps, trim, mute or copy streams.
ConvertersPlan lesson lengths across a video course, see total runtime by module, and flag lessons long enough to lose the viewer.
Education & ScienceWork out where to place calls to action across a video timeline, with hook protection, card limits and end-screen timing.
Marketing & SocialVideo Description Template Builder
Build reusable video descriptions with chapters, links and hashtags, checked against the 5,000-character and chapter rules.
Marketing & SocialVideo Duration Target Speed Calculator
Find the exact speed multiplier needed to hit a required runtime, plus how much to cut if the speed change is too aggressive.
CalculatorsVideo Engagement Rate Calculator
Work out engagement rate by views, impressions and followers, plus view-through rate, average percentage viewed and total watch time.
CalculatorsEstimate video export file size from bitrate and duration, or derive a bitrate from resolution, frame rate and codec.
CalculatorsVideo Frame Continuity Inspector
Sample bounded frames from a local video and review near-duplicate runs or high visual changes without uploading the media or making an authenticity claim.
Image & VideoVideo Frame-to-Sprite Extractor
Export selected video frames as a single tiled sprite sheet PNG.
Image & VideoSee how playback speed changes your lecture backlog finish date, with a full 1x-2x comparison table.
ProductivityVideo Production Budget Calculator
Build a video budget from crew day rates, gear rental, post-production hours, contingency, production fee and 18% GST.
Finance & BusinessVideo Production Checklist Generator
Generate pre-production, shoot-day and post checklists with time estimates and a call-sheet timeline for any video type.
ProductivityScore every 15-minute upload slot against your audience's timezones and find the publish time that lands in the most local prime windows.
Marketing & SocialEstimate export time from timeline length, resolution, frame rate, codec, effects load and machine class.
CalculatorsGenerate opening hooks from proven copywriting patterns, timed against the first-three-seconds budget for your video format.
Text & WritingTime and sync video scripts with production requirements and production notes.
Image & VideoPlan a video series across weeks: pick publish days, set a cadence, and map topics and formats onto dated episode slots.
Marketing & SocialSmooths shaky footage using frame-motion analysis.
Image & VideoGroup keyword sets once and reuse them across a channel, with de-duplication and a live count against the 500-character tag limit.
Marketing & SocialPull still frames out of a video at evenly spaced or fixed-interval timestamps and download them as images.
Image & VideoExtract, trim, edit, and export audio from video files directly in your browser.
ConvertersConvert MP4, WebM, or OGG video clips into highly-optimized animated GIFs directly in your browser. Customize frame rate, dimensions, loop options, and speed.
ConvertersTurn a short video clip into an animated WebP by sampling frames in your browser and muxing them into one file.
ConvertersRead a video file's real specs in the browser and work out its bitrate, aspect ratio, frame count, timecode, letterbox bars and target-size transcode settings.
Image & VideoTrim video clips in your browser with precise start and end controls.
Design & ColorEstimate how long a video file takes to upload from its size and your connection speed, including protocol overhead.
CalculatorsView To Subscriber Ratio Calculator
Convert views and new subscribers into a per-1,000-views conversion rate, with goal projections and period-over-period trend.
CalculatorsGenerate high-converting, viral YouTube thumbnails using AI. Answer a few questions about your video, generate the layout, add an optional headline woven into the AI prompt, and download.
AI ToolsWhat to carry to your VFS Global, BLS International, US consulate, UK VAC or Canada VAC appointment in India, with rules on phones, bags and documents.
ProductivityEstimate the full visa cost for Indian applicants for the USA, Schengen, Canada, Australia, Singapore, Thailand, Malaysia, Vietnam, Turkey and South Korea, including service fees.
Finance & BusinessWrite a visa cover letter for Schengen, USA, Canada, Australia, Singapore, Thailand, Malaysia, Vietnam, Turkey or South Korea, with the details each embassy expects.
Text & WritingVisa Rejection Reason Explainer
Understand the refusal code or reason on your Schengen, USA, Canada, Australia, Singapore, Thailand, Malaysia, Vietnam, Turkey or South Korea visa rejection and how to reapply.
LifestyleTest your working memory capacity — memorize colored shapes and recall their positions in increasingly challenging rounds.
Education & ScienceTurn a weekly or monthly vitamin D dosing instruction into dated doses, with the average daily IU compared to the RDA and upper limit.
Health & FitnessTrack your daily vitamin and supplement intake — Vitamin D3, B-Complex, Magnesium, and more — with dosage guidance and adherence streaks.
Health & FitnessVitamin IU to Microgram Converter
Convert vitamin A, D and E between IU and micrograms using the official per-form factors, with Daily Value and upper-limit context.
Health & FitnessEstimate your VO2 max from a Cooper run, 1.5-mile run, Rockport walk, step test or resting heart rate, and rate it against Cooper Institute norms.
Health & FitnessBuild your English vocabulary with 120 curated words across Easy, Medium, and Hard levels. Learn with flip cards and test yourself with multiple-choice quizzes.
Education & ScienceVocabulary Complexity Analyzer
Analyze the complexity of vocabulary in text
Education & ScienceSplit audio you own into vocals, bass, drums and instrumental stems.
Image & VideoFree online voice changer: record or upload audio, apply robot, chipmunk, deep, echo, reverb, telephone or alien effects, preview live and save as WAV.
FunSee non-diagnostic feedback on how steady your pitch and volume stay.
DeveloperConvert spoken language into written text.
AI ToolsVoiceover Rate Card Calculator
Price a voiceover job from script length, media usage, territory, licence term and exclusivity, split into session fee and usage fee.
Finance & BusinessVoiceover Script Duration Estimator
Estimate spoken runtime from a script or word count, including punctuation pauses, and see the pace or word count needed to hit a target length.
CalculatorsSplit a script into numbered narration blocks with per-cue word counts, running timecodes and an estimated read time at your pace.
Text & WritingNeutralize speaker-identifying vocal cues while keeping the speech intelligible.
Image & VideoVoltage Converter vs Adapter Explainer
Reads your appliance label against the destination mains to say whether a plug adapter is enough or you need a real converter.
Education & ScienceVoltage Drop & Wire Gauge Calculator
Estimate voltage loss along a wire run from its length, current, and conductor type or gauge.
CalculatorsSize a voltage stabilizer in kVA and pick the right working range for an AC, fridge or TV from its wattage and your site voltage swing.
CalculatorsFind the volume of a cube, box, cylinder, cone, sphere, pyramid, prism, capsule, frustum or pipe in m³, litres or gallons, with a sketch, steps and weight.
CalculatorsDraft a volunteer agreement with role, hours, conduct, confidentiality and reimbursement terms that stay clear of an employment relationship.
Finance & BusinessGenerate stunning Voronoi diagrams and abstract art with customizable colors and patterns
Design & ColorConvert WebVTT captions back to SubRip: strip cue settings and regions, renumber cues, optionally flatten styling tags, and fix timing drift.
Converters