Media & design
17 tools
Video bitrate calculator
Fit a video into a file-size budget, with room for audio and overhead.
CalculatorAudio file size calculator
Estimate raw PCM or compressed audio size in MB and MiB.
CalculatorAspect ratio calculator
Find a simplified ratio and scale image or video dimensions.
CalculatorSubtitle time shifter
Shift SRT or WebVTT timing and download the updated subtitles.
UtilityScreen pixel density
Calculate PPI, pixel pitch and physical screen dimensions.
CalculatorColor contrast checker
Check solid text colors against WCAG AA and AAA thresholds.
CalculatorCamera crop factor
Compare full-frame equivalent focal length and depth of field.
CalculatorBPM to delay time
Turn tempo into note, dotted-note and triplet delay times.
CalculatorFFmpeg concat list builder
Build an ffconcat list with quoted paths and escaped apostrophes.
CalculatorFFmpeg xfade timeline
Calculate chained crossfade offsets and export a video filtergraph.
CalculatorREAPER media reference inventory
List FILE paths inside RPP SOURCE chunks with their track context.
UtilityFFmpeg keyframe time planner
Round requested keyframe times to an explicit encoder time base.
UtilityFFmpeg audio cut graph
Build a sample-accurate trim/reset/concat graph from ordered edit intervals.
UtilityFFmpeg sendcmd file builder
Create enter/leave command intervals with quoted arguments.
UtilityXSPF track timing sheet
Export track metadata, resolved locations and a known-duration timeline.
UtilityFCPXML spine time ledger
List direct primary-spine entries with exact rational offsets and end times.
UtilityELAN reference time envelopes
Follow EAF annotation references to declared ancestor time boundaries.
Utility