Site index

All calculators and policy pages on Tools for Video Editors.

Production tools

Video bitrate and file size calculatorCalculate estimated video file size from duration and bitrates, or find the bitrate available for a target file size.
Timecode calculator and converterConvert SMPTE timecode to absolute frame count and elapsed time, including 29.97 and 59.94 drop-frame timecode.
Frame count and duration calculatorConvert a video duration to a frame count or frames back to duration at common and custom frame rates.
Aspect ratio and resolution calculatorReduce a raster to its exact aspect ratio and calculate a matching width or height for a target frame.
Crop, scale, and letterbox calculatorCalculate fit, fill, crop, and letterbox geometry between a source raster and target canvas.
Frame rate conform duration calculatorCalculate the new duration and speed change when existing frames are interpreted at another frame rate.
Local video metadata inspectorInspect browser-readable video duration, raster, aspect ratio, file size, type, and estimated average data rate without uploading the file.
SRT caption validator and shifterValidate SRT cue structure and timing, shift every caption locally, preview the result, and download a corrected copy.
Chapter timestamp formatterNormalize chapter timestamps into a clean YouTube-style list and validate their order and starting timestamp.
Image sequence frame calculatorCalculate inclusive image-sequence frame counts, duration, handle ranges, and detect missing frames from a pasted frame list.