Free Tool Directory

Best Free Tools for Video, Audio, Podcasts, Captions

A practical resource page for creators who need browser-based planning, measuring, checking, and publishing tools without accounts or paywalls.

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Video Tools

Exposure Triangle CalculatorISO, aperture, frame rate, shutter, and ND guidance. Script & Shot PlannerPlan scenes, timing, shots, and export a production PDF. Storyboard GeneratorBuild shot frames with references, notes, and timing. Video Specs FinderQuick delivery settings for common platforms. Bitrate CalculatorEstimate bitrate, file size, and export targets. Shot List Template PDFA printable planning sheet for small shoots.

Audio Tools

EQ ReferencePlain-language frequency ranges for common mix problems. LUFS File CheckerEstimate integrated loudness and interpolated peak level locally in the browser. Loudness NormalizerAdjust audio toward common delivery targets. Audio Denoise ToolClean noisy speech files locally in the browser. Stereo Width CheckerCheck mono compatibility and stereo balance.

Podcast Tools

Podcast Level MeterCheck speech level, loudness, and peak safety. Podcast LUFS Cheat SheetCommon targets and a repeatable mix pass. Podcast Artwork ValidatorCheck artwork size, shape, and platform readiness. Podcast RSS ValidatorCatch missing feed fields before submission. Show Notes GeneratorFormat episode notes, chapters, and links. Podcast Mix Checklist PDFA printable delivery QA sheet for each episode.

Captions and Accessibility

Caption Readability CheckerFlag CPS, line length, duration, gaps, and overlaps. Caption Examples PageSee readable and hard-to-read cue examples. SRT Caption EditorEdit caption timing and text in the browser. Contrast Checker (WCAG)Check title text and graphics for visibility. Media Creator Accessibility ChecklistA publishing checklist for videos, podcasts, captions, and transcripts. Caption QA Checklist PDFA printable cue-level review sheet.

What free actually means here

Every tool listed runs in your browser with no account, no upload and no trial period. That is a deliberate constraint rather than a price point, because a tool requiring a sign-up is a tool you cannot use in the ten seconds between noticing a problem and needing an answer.

Free also means these are unsuitable for some work. Anything needing a project file, collaboration, version history or a rendering queue belongs in an application built for it. These are for the quick, self-contained job: check a number, validate a file, work out a setting, produce one small asset and move on.