Check and fix an ADIF log
Drop the log and every QSO is checked field by field against the ADIF specification. What has a single right answer is fixed with one click; everything else opens in a card where you edit the QSO yourself.
What is checked
The fields every logger and LoTW need — call, date, time, band or frequency, mode — and then each field by its ADIF type: dates and times that exist, numbers that are numbers, grid squares, latitude and longitude, Y or N where ADIF wants Y or N, values from the ADIF lists (QSL_RCVD, QSL_SENT, PROP_MODE, continent and the rest), DXCC codes, CQ and ITU zones. A band that does not match the frequency is found, and so is a mode that ADIF keeps as a submode.
What is fixed with one click
Only what has one right answer: the band taken from the frequency when it is missing or wrong; FT4, USB or JS8 moved from MODE to SUBMODE under MFSK, SSB or MFSK; old mode names such as PSK31 written the current way; spaces around a callsign; latitude and longitude in decimal degrees (40.749971) written as ADIF wants them (N040 44.998), and a longitude written with N or S, as one logger does, put back as E or W; 160.0 in a whole-number field as 160. Nothing else is touched.
What you fix yourself
A date that does not exist, a mode ADIF does not know, a value outside its list. Click the QSO: every field opens for editing, with its name and description from the specification; remove a field, add one, or delete the whole QSO. To set one field in many QSOs at once — your grid square, your callsign, a POTA reference — use “Edit fields”: in every QSO the filters show, or only in the ones you tick.
Questions
- Why does LoTW or Club Log reject my file?
- Most often a QSO without a band or mode, a mode name it does not know, or FT4 written as a mode on its own. Those are exactly what this check looks for first — fix them here, save, and upload the new file.
- Are fields my logger added flagged as errors?
- No. Fields that are not in ADIF, like the ones some loggers add without the APP_ prefix, are listed as worth a look, not as errors, and kept as they are.
- Is the log uploaded?
- No. The file is checked and fixed in your browser; nothing is sent anywhere.